"Not too early I hope." He's always preferred late nights and late mornings, although it'd probably be rude to say so. So instead he invents an excuse.

"Still recovering from the trip. Such a beastly flight." A twelve hour trip in 1955, with two refueling stops along the way, and it doesn't quite occur to him that it might have improved in the last sixty years. "It was worth it to be here now, but I have an absolute horror for aeroplanes and I'm completely knackered."