That seems strange, odd to throw out all away at that stage, when all the work has already been done and the expense of typesetting it has already been paid. G

That seems strange, odd to throw out all away at that stage, when all the work has already been done and the expense of typesetting it has already been paid. Getting it bound is relatively less, unless they wanted more than one copy. Maybe he disagreed with the corrections? Or maybe he had run out of money to correct minors? Maybe the reviewers were critical and he was annoyed by that.