The bloodstain was conclusive, in his opinion, on that point.

Besides, as the bridge was up, there was no other possible way of escaping.

He could not explain what had become of the assassin or why he had not taken his bicycle, if it were indeed his.

He could not possibly have been drowned in the moat, which was at no place more than three feet deep.
In his own mind he had a very definite theory about the murder.

Douglas was a reticent man, and there were some chapters in his life of which he never spoke.