I, decidedly puzzled, watched him for the rest of the evening.

He appeared to have some disturbing matter on his mind, and his gaiety was clearly forced.
It was well on toward morning when the party broke up, and after some slight conversation of a desultory sort the Colonel, Rad and I went up to our rooms.

Whether it was the excitement of the evening or the coffee I had drunk, in any case I was not sleepy.

I turned in, only to lie for an hour or more with my eyes wide open staring at a patch of moonlight on the ceiling.

My old trouble of insomnia had overtaken me again.