Clearly, the Malfoy family and the Greengrass family still maintained a fairly close partnership.
Without such close cooperation, Draco would not have known so much, including that Astoria Greengrass's frailty stemmed from an inherited family curse.
The last paragraph Draco had written was interesting, too. Astoria Greengrass had little magical aptitude and had almost been mistaken for a Squib.
Before starting school, young wizards would experience something known as "accidental magic."
Within a wizarding household or family, whether a member had displayed "accidental magic" was usually used to determine whether they were a wizard or a Squib.
"Accidental magic" was rather like the body casting spells on its own. Some researchers even considered it a manifestation of "wandless magic."
Any display of "accidental magic," however faint, could serve as proof that someone was a wizard. Without it, they would be considered a Squib.
When Harry visited other compartments on the Hogwarts Express, he often shared stories about his life at his uncle's house, including incidents involving "accidental magic."
For instance, Aunt Petunia had once cut off almost all of Harry's hair. Before going to sleep, Harry had worried about going to school, only to find the next morning that all his hair had grown back, restoring its previous style.
On another occasion, before Harry received his acceptance letter, he had visited the zoo with his uncle's family and made the glass of an enclosure in the reptile house disappear.
Luna had also told Wizet about her experience with "accidental magic." When she was very young, she had seen birds outside her window and wanted to fly like them.
Her pillow had swelled as though someone were inflating it, then carried her straight out of the window. Xenophilius Lovegood had happened to be coming home and caught her before anything could