We found--easily--a man who'd been their valet, and who remembered their setting off on the hunting expedition.

They never came back--to Jermyn Street, anyway.

Nothing was ever heard or seen of them in their old haunts about that quarter from that time.

And when we'd found all that out, we came straight down, last evening, to the police--and that's all, Mr.Lindsey.And, of course, the thing is plain to me--Gilbert probably died while in this man's company; this man possessed himself of his letters and papers and so on; and in time, hearing how things were, and when the chance came, he presented himself to the family solicitors as Gilbert Carstairs.
Could anything be plainer ?" "Nothing!" exclaimed Mr.Lindsey.

"It's a sure case--and simple when you see it in the light of your knowledge; a case of common personation.