Mr.
David Hume-Frazer was curled up in an arm-chair asleep, or rather dozing, for he stirred a little when the man put some coal in the grate.

This was at 1 a.m.

exactly.
"At 1.10 a.m.the butler thought he heard his master's voice coming from the front of the house, and angrily protesting something.

Unfortunately he could not catch a single word.

He imagined that the 'quarrel' spoken of by David had been renewed.
"He waited two minutes, not more, but hearing no further sounds, he walked round to the library windows, thinking that perhaps he would see Sir Alan in the room.
"To his dismay he found his young master stretched on the turf at the side of the drive, thirty feet from the house.