Probably had a million stamps left over from the House Post Office? In some ways it will be sad to see Harry go, he was even more inept (and even more croked)than Tom Daschle.
The problem here is that this one transaction is not documented.
There is probably another undocumented transaction that offsets the 400k transfer of the original purhase.
There is no federal form to file bribe money for re-zone efforts, so that may be the offsetting transaction.