"There are such things as skeleton keys," commented the detective.
Either they found her door unlocked, or they were prepared with skeleton keys.
He was also an expert locksmith and had a large assortment of skeleton keys.
He might, indeed, have managed to open it if he had been left his skeleton keys.
He went on to explain about Alice, and this while he was trying his skeleton keys.
From his pocket the range-rider took a bunch of skeleton keys.
Yes, it was here—at least the flashlight was, and so were the skeleton keys.
Matre Aubin had no difficulty in showing that the burglars needed no skeleton keys since the doors were open.
Sometimes, too, in their nervous workings, they drooped together like a bunch of skeleton keys.
Stealthily raising himself in bed, he saw a burglar endeavoring to open his desk with skeleton keys.