He squeezed Buckbeak’s sides with his heels. Harry and Hermione jumped back as the enormous wings rose once more. . . . The hippogriff took off into the air. . . . He and his rider became smaller and smaller as Harry gazed after them . . . then a cloud drifted across the moon. . . . They were gone. Rowling, J.K. Harry Potter and the Prisoner of Azkaban (p. 168). Pottermore Publishing. Kindle Edition.

“I went to see Professor McGonagall this morning, just before breakfast. I’ve decided to drop Muggle Studies.” Rowling, J.K. Harry Potter and the Prisoner of Azkaban (p. 174). Pottermore Publishing. Kindle Edition.

Personally, Harry thought the device was too good to pass up and had had Dobby pop in to get him one of each type to experiment with over the summer and the upcoming year.
Maybe send one of the better ones to Sirius, who had followed his advice and named his little out of the way place Neverland and was enjoying the books Harry had Dobby send along with them a lot.

Second star to the right, and straight on till morning to get there after all.