My reading was that he threw the objects aside, not through the mirror, so they got sealed together with Dumbledore's pocket mirrorverse (a mirrorverse... he must have been hiding a goatee under that fake beard!)
I assumed that by throwing them away, they were not taken into the Mirror with Dumbledore when he sent himself into the frozen instant, instead of Harry.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 110.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: