Chapter 43

1. Bronze ink on the edge of a report card

On the evening the results were announced, Harry Potter stood outside the oak door of the Hufflepuff Common Room, his fingers absently rubbing the edge of a rolled-up parchment. A few flecks of bronze ink still clung to it, smudged there when Hailey had taught him to mark the points where force was applied in a spell. Supposedly, the ink contained vibranium powder and glowed faintly blue in moonlight. He could feel the words "Charms: Good" burning through the parchment, hotter than the sweat on his palm.

"Go on, knock." Ron stood beside him on tiptoe, peering around, two packets of Honeydukes sweets tucked against his chest. He had gripped them so tightly that the Chocolate Frog designs on the wrappers had warped. He had bought them with three weeks of saved pocket money, intending to celebrate a Quidditch victory, but now they felt like two scorching stones pressed against him. "If you dawdle any longer, Hailey and the others will be off to dinner!"

Hermione pushed up the round glasses she rarely wore, her fingertips brushing the edge of her own report card. A small piece of dried lavender was stuck there, pressed flat using the method Eileen had taught her. Supposedly, it helped calm nerves. "Don't rush him," she said softly, with her usual sense of order. "Hailey said you have to find the right angle for gears to mesh; you can't hurry it. Besides, they'll be happy for you, especially since your Charms score in the last mock exam was still 'dancing on the edge of a pass.'"

Harry took a deep breath and finally raised his hand to rap the knocker. The bronze badger-shaped knocker made a mellow sound, like a piece of jade polished by years of handling. A faint commotion came from inside, followed by Eileen's unmistakably loud voice. "Coming, coming! Stop knocking! Any more and you'll shake the pumpkin lanterns down!"

When the door creaked open, the warm yellow glow of pumpkin lanterns spilled out, mingled with the combined scent of nutmeg and vibranium—the distinctive smell of Hailey adjusting her instruments. Hailey was sprawled over the common room's long table, writing. The edges of her parchment were speckled with silvery-blue powder, smudged there when she calibrated the vibranium analyzer that morning. A quill stood in the ink bottle before her, its tip still dripping emerald-green ink made from Venomous Tentacula juice mixed with turmeric powder. It turned gold when heated, a secret code she and her father had developed by modifying it.

"Well, look who it is." Eileen sprang up from the carpet, where she had been crouching to label spice jars. Her panda hair clip swayed gently with the movement, and a cinnamon stick was still caught in the ends of her hair, apparently just "borrowed" from the kitchens. Turmeric powder coated her fingertips as she drew a crooked smiley face on a label. "Aren't these our 'Quidditch hero' and the 'champion who nearly failed Arithmancy'?"

Ron's ears turned scarlet in an instant. He thrust the honey sweets into Eileen's hands, his excitement unmistakable beneath the rustle of the wrappers. "Quit teasing! I passed Arithmancy, all thanks to the gear-and-star-orbit diagram you drew. It was a hundred times easier to understand than Percy's lousy notes full of 'magical intuition'!" He suddenly lowered his voice and leaned in mysteriously. "Seriously, drawing Jupiter's orbit as a gear train was pure genius-even my mum said it was much more reliable than a crystal ball."

Hailey put down her quill. The writing on the parchment had already turned a warm gold. "What brings you here? I thought Gryffindor would be throwing a wild party over the results." Her gaze fell on the roll of parchment in Harry's hand, where the bronze ink marks stood out in the lamplight. "Looks like someone's 'gears' are turning nicely?"

Harry spread his report card on the table, his fingertips pausing over "Charms: Good" as the tips of his ears turned faintly red. "Your 'meshing gears' analogy really helped. Whenever I practiced the Levitation Charm, I kept thinking about the angles of the driving and driven gears, and the feather stayed much steadier. And that vibranium protractor helped me correct a three-degree error. Professor Flitwick said my wand movements had finally gained 'mathematical precision.'" He pulled a smooth-polished pebble from his pocket, its surface shining softly. "I picked this up in the Forbidden Forest. It seemed to have a little magical fluctuation, just like you said. Maybe it can stabilize small fluctuations in magic, and maybe you can use it to calibrate your instruments."

Hailey took the pebble, its coolness meeting her fingertips, and suddenly laughed. "I told you, your instinct for spells is like gears that naturally mesh. A little lubrication and they turn smoothly." She tapped it gently with the tip of her wand, and a faint blue light shimmered across its surface—a trace of magical resonance. "It really could serve as a calibration weight, and it's handier than the brass blocks in my dad's lab. I'll give it a coating of vibranium scraps later. That'll increase its sensitivity by forty percent."

Eileen had already opened the honey sweets, and a rich chocolate aroma spread through the air with the scent of nutmeg. "So our Chosen One has finally shed the title of 'Charms disaster'? Come on, tell us-did you secretly use my 'spice memory method'?" She suddenly clapped her hands, and the gems on her panda hair clip flashed. "I knew it! I saw you sprinkling nutmeg powder on your spellbook last time. Don't think I didn't notice!"

Hermione stepped forward and took a small linen pouch from her canvas bag. It contained dried lavender, its fragrance as delicate as moonlight. "I dried this using Eileen's recipe. It can ease headaches from staying up late to revise. Hailey, I also organized a copy of your Muggle analogy notes and marked how they correspond to magical principles. They might help the younger students understand-for example, 'the principle of leverage = the point where force is applied in the Summoning Charm,' and 'quantum entanglement = the spatial logic of Apparition.'"

Hailey opened the notes, her fingertip passing over the annotation "the principle of leverage = the Summoning Charm." A piece of dried lavender was still stuck to the edge of a page. "I'm glad they helped, though you all worked hard yourselves. I saw the lights on in the Gryffindor Common Room in the middle of the night." She remembered the faint lights she had seen through the corridor window on those nights, like little stars striving to burn. "Especially you, Harry. The last time I caught you practicing spells by the Quidditch Pitch, you didn't even get distracted when the Golden Snitch flew past."

"Let's celebrate in the kitchens tonight!" Eileen suddenly clapped her hands. The cinnamon stick in her hair fell onto the carpet with a crisp sound. "I brought some newly arrived Ceylon cinnamon. Sprinkle a little on the Rock Cakes while they bake, and I guarantee they'll smell even better than usual!" She bent to pick up the cinnamon stick, then suddenly remembered something and stuffed a small half-packet of nutmeg into Ron's hand. "Keep this. You'll definitely need it for advanced Herbology next term. And don't do what you did this time, treating a Mandrake like an ordinary onion. Professor Sprout's expression was almost what it would've been if she'd seen a Troll dancing."

Ron's ears turned scarlet in an instant. He turned helplessly to Hermione, his fingers stiff around the nutmeg, but for once he didn't argue. Harry looked at the pebble in Hailey's hand and suddenly felt that the magical theories that had once seemed so obscure were like the lines on the stone-seemingly jumbled, yet hiding a pattern—and Hailey and Eileen were the key that helped them find it. He remembered what Hailey had said: "Magic isn't an indecipherable book. It's like a Muggle clock: however complicated the mechanism, it becomes simple when you break it down into gears."

Hailey put Hermione's notes into her canvas bag, where half a piece of gingerbread stuck out. Nini had baked it, and she had carved its edge into the shape of a gear. Watching the three laughing and joking before her, Hailey suddenly recalled the words in her father's letter: "The best invention isn't a complicated machine. It's a lubricant that lets different gears turn together in harmony." At that moment, sunlight streamed through the stained glass, casting overlapping patches of light at their feet like a diagram of gears slowly meshing.

"Let's go," Hailey said, picking up her canvas bag, her vibranium bracelet clicking softly. "If we don't hurry, the House-elves in the kitchens will have given all the Rock Cakes to Ravenclaw." Eileen was already pulling Ron toward the door, Hermione following behind. Harry came last, and as he passed Hailey, he said quietly, "Thanks. Not just for the grades."

Hailey paused and smiled as she watched him walk away. Some help didn't need to be put into words, just as some gears didn't need to be deliberately aligned-when their rhythms matched, they naturally turned smoothly. And perhaps this was the warmest form cross-dimensional wisdom could take, just as she had said: "Real gears are never forced to mesh. They turn with each other willingly."

2. A non-magical promise in the white steam

As steam from the Hogwarts Express spread into a white mist at King's Cross Station, Harry was stuffing the Standard Book of Spells into the bottom of his backpack. The bronze ink marks on its cover had faded considerably, but the outline of the "diagram of gear-meshing angles" was still visible. Hailey had marked it as important, saying, "Even without a wand, looking at it a few more times can 'warm up' the spells in your head."

The cuffs of Ron's old sweater were frayed. He kept patting the honey sweets in his pocket, their wrappers rustling as if to remind him of something. "It's all Fred and George's fault. They just had to play with that 'firework spell' in the carriage, and we nearly missed our stop," he muttered. He suddenly remembered something and pulled a wax-paper parcel from his backpack. "Nearly forgot this!"

Hermione's hair was a little disheveled from the steam. She handed Harry the "Muggle analogy notes" Hailey had organized. Along the edge of the pages, the words "For theoretical reference only; do not practice" were written in green ink, the neat handwriting almost like print. "Remember, you can't use your wand over the summer." She paused, then added, "But you can do what Hailey said and draw 'magic trajectory diagrams' in your head. Think of it as oiling the gears so they'll turn smoothly when term starts. Especially that 'figure-eight trajectory for the Levitation Charm'-you always tend to veer two degrees to the left."

When Hailey and Eileen came over carrying their canvas bags, the noise in the carriage suddenly dropped a notch. A piece of dried lavender was tucked into Eileen's panda hair clip. She had secretly picked it from the greenhouse, saying, "It doesn't count as a holiday unless I take the smell of Hogwarts home with me." "Here." She pressed a small bag of nutmeg into Harry's hand, the warm scent of spice spreading through the steam. "My mum says this smell can remind you of the Hogwarts Kitchens—you can 'smell' magic without a wand, right? If you feel like practicing the Memory Charm, just give it a sniff. I guarantee it'll work better than any spell."

Hailey held out a smooth-polished pebble, its surface shining pale blue-green, a hair-thin ring of vibranium embedded around its edge. "I made a few improvements to this one you picked up in the Forbidden Forest." Her fingertip traced the lines on the stone as though she were stroking a vibranium gear. "I added a little starburst iron powder inside. When an owl delivers a letter, it'll get a little warm. Consider it a 'non-magical signaler'-better than keeping watch over an empty mailbox at the Dursley family's."

Harry held the stone, its coolness reminding him of Hailey's vibranium analyzer. He suddenly smiled. "You two really have figured out every angle of the 'no-magic rule.'" He remembered Hailey saying that the Leicester family motto was, "There are always gaps in the rules, like the lubricating oil between gears."

"You bet!" Eileen patted her canvas bag, where half a piece of gingerbread stuck out, its edge carved by her into the shape of a gear. "Hailey and I invented a 'wandless revision method.' We use Muggle mind maps to memorize spells, breaking 'Wingardium Leviosa' into three words: 'wing, guard, fly.' It's much easier to remember than rote memorization!" She suddenly leaned close to Harry's ear, her voice lowered almost to a whisper. "If the Dursley family bullies you, just smell the nutmeg. Imagine us cheering you on beside you—it'll work better than any spell. My mum says the power of thought is sometimes stronger than a wand."

Hailey opened her own notes. One page bore a "diagram of the force applied in the Levitation Charm" marked in red ink, but in the corner, she had written in small letters, "Theoretical model only; do not try during the holidays." "Magic is actually a lot like Muggle physics," she said, pointing to the arrows in the diagram. "Even without waving a wand, thinking through the 'direction of the force' counts as practice. It's the same principle as Muggle athletes rehearsing their movements in their heads." She paused, then added, "Oh, and don't lose the stone. It understands 'waiting' better than any magic-just as we'll wait for you to come back next term and show us even better spells."

As the whistle gave a long blast, Ron suddenly thrust the wax-paper parcel into Hailey's hands. "Nearly forgot! My mum sent these over. Rock Cakes she baked herself, no magical spices, a purely Muggle recipe-to thank you both for helping me pass, especially Arithmancy. That gear-and-star-orbit diagram was more reliable than Percy's notes. Mum said I should take you to Diagon Alley next term for real baked cakes, even better than the ones from the Hogwarts Kitchens!"

Eileen's panda hair clip flashed as she took the parcel. "I wouldn't be so sure. After all, we've improved the Hogwarts version. Next term I'll teach you to use a Muggle abacus to study Divination. I guarantee it'll be more accurate than a crystal ball. My dad says numbers never lie, unlike certain prophecies that always like to talk in circles." She suddenly remembered something and pulled a small notebook from her bag. "Oh, right, this is my new recipe for 'anti-sleep spice.' I added a little ground coffee bean. Take a sniff when you're up late reading your notes; it's ten times gentler than Baruffio's Brain Elixir. Don't tell your mum I said that, though. She's always saying I treat Potions like snacks."

Finally, Hailey patted Harry on the shoulder, her fingertips brushing the notebook sticking out of his backpack. "Remember to leave the stone in the sun. Starburst iron needs photosynthesis to maintain its sensitivity." She recalled her father saying that Muggle solar panels and starburst iron in the magical world were both essentially energy converters. "Just as people need sunlight to stay in a good mood, magical objects do too."

As the train started, Harry watched the two of them walk toward another compartment and suddenly felt that perhaps the days when he couldn't use his wand wouldn't be so hard to get through. The pebble in his pocket, the scent of nutmeg, the notes covered in gears-like silent gears, they quietly meshed the concern that spanned two worlds. Through the white steam, he seemed to see Hailey's vibranium bracelet gleaming in the sunlight, forming a curious resonance with Eileen's panda hair clip, like an unspoken promise: no matter how many Muggle blocks lay between them, Hufflepuff's warmth would always find a way to reach him.

Just as Hailey had written at the end of her notes: "True magic never needs a wand, as long as you're willing to practice more. Just as true friendship never needs spells—it only needs gears willing to turn, and a little cross-dimensional courage." And now, hidden in the steam at King's Cross Station, countless such gears were quietly beginning to turn anew at the edge of the Muggle and wizarding worlds.