Colonel Thorndyke's Secret

"I should certainly think that he would know it, sir. The bedroom was the same that my grandfather used to sleep in, and probably during the years before we came here young Bastow would have often been over the house. The first year or two after we came he was often up here with his father, but I know that my father took such an objection to him, his manner and language were so offensive, that he would not have me, boy as I was--I was only about eleven when he came here--associate with him in the smallest degree. But during those two years he may very well have noticed where the ladder was."