The page where a work's making is recorded — who, how, and with what hands.
Greek kolophon (a summit, a finishing touch); the page at a book's end that records how it was made borrows the word for the last stroke that completes a thing.
The colophon is the one page in a work that speaks about the work rather than in its voice — it steps outside the telling to say who actually did the telling, which is this house's own habit of leaving a record of hands rather than letting a finished thing pretend it made itself.