When the warden begins to head toward the door in order to let Dyke's sister enter his office, he is holding a cigar in his right hand. But on the next immediate cut, as he reaches the door and then opens it; there is no longer a cigar in his hand.
James gets his fake last name from a calendar in the police station. The calendar says it is May 1928, but May 1st is shown as being on a Wednesday. May 1, 1928 was a Tuesday.