Atzerodt Confession

[RJNorton]

Was the "final meeting" on the night of April 13th or 14th?

On pp. 214-215 of American Brutus Mike Kauffman has Booth meeting with Herold and Atzerodt in Powell's room at the Herndon House on the night of the 13th. Mike goes on to say that it was at this time that Booth explained all the various assignments as to who would kill whom. I looked to see if Mike has another Herndon House meeting on the 14th and could not find that he does. I know that Powell checked out at about 4 P.M. on the 14th.

I realize most authors have the "final meeting" on the 14th, but could it actually have been on the 13th instead?