“There’s nothing to be done,” said the detective. “Robinson has been arrested, and while he might be cleared by a skilful lawyer, he hasn’t any money to spend on his defence. Whether he is cleared or not, his reputation is ruined.”

“Unless the loot is found,” put in Joe.

“Yes, unless the loot is found. That is his only hope. But I don’t think there’s much chance of that.”

And there the mystery of Tower Mansion rested for the time being. The arrest of Mr. Robinson furnished a sensation for a day or so and then the case receded into the background, the newspapers finding other things to become excited about. But for the Robinsons it was, naturally enough, a matter of supreme moment. Perry Robinson paid a call at the Hardy home, pleading with the great detective to continue his efforts to clear the accused man.