The man didn’t put his luggage outside the door on time because ______.

M: What in heaven’s name happened to my baggage?
W: Are you with Mr. Grey’s party?
M: Yeah, and my suitcases have disappeared. What are you going to do about it?
W: You did put your cases outside the door by 8, did you sir?
M: Yeah. Well, maybe it was a bit later, say about 9:30. We didn’t get to bed till well after 3 am.
W: I see. Well, the bellboys would have picked up the group’s luggage just after eight. You do remember putting the cases outside the door?
M: Yeah, sure we did. Do you think we’re nuts or something?
W: I’ll just check with the bellboy and see if he remembers collecting any baggage from outside Room 369.
M: Thanks. Two soft pig-skin suitcases with blue and white stickers on them. One of them had my movie equipment in it.
W: The bellboy says there was nothing outside 369 except a pair of brown shoes which he had cleaned and returned about 9:20.
M: Yeah. I put the cases out when I took my shoes in.
W: Oh, I see. In that case it looks as if they might have been stolen. I’m afraid this will have to be reported to the police. I’ll deal with this personally and see what can be done.