frog&fog (32)
"Please give her the potion every six hours." After settling Pomona in Sasse's cabin, Severus spoke to Fiona.
"I'll remember, sir." Fiona took the silver potion bottle and answered softly.
Severus glanced back at the half-blood Veela sleeping peacefully on the bed. Just as he turned to leave, he heard Gong Saiyi's voice.
He found an empty room, went inside, and took out the communication crystal.
"You won't believe what we found," Gong Saiyi said. "Do you still have the map?"
"Of course," Severus said.
"Gianluca said that to solve a geometry problem, you need a coordinate system. We've already found the y-axis: the Rose Line. Next, we needed the x-axis. At first, he planned to draw a horizontal line perpendicular to the Rose Line. Then we connected Balzac's former residence and Alexandre Dumas's former residence. It was almost perpendicular to the Rose Line, and it also passed through Les Invalides," Gong Saiyi said. "You can draw it on the map yourself."
Severus found an empty table, spread the map across it, and drew the lines as Gong Saiyi described. Sure enough, a cross appeared on the paper.
"Looking at it through this coordinate system, the focus of Père Lachaise Cemetery isn't on the x-axis, and its center isn't at the origin either. Next, we needed to calculate the ellipse's flatness. And guess what? When we connected Lestrange Family Cemetery with Victor Hugo's former residence, the extended line landed right on The Hunchback of Notre-Dame. That genius connected The Hunchback of Notre-Dame to Les Invalides, and that line intersected the Rose Line at the Church of Saint-Germain-des-Prés. With those two points, he used that little gadget to draw an extremely flattened ellipse. Have you drawn it?"
"Go on," Severus said without looking up as he continued drawing.
"Then