Edgar got out at Twenty-Third Street. Mark kept on till he reached Forty-Seventh Street. He walked toward Seventh Avenue, and finally stood in front of the house in which the customer for the diamond rings was staying. It was a plain three-story residence with nothing peculiar about it. Mark rang the bell, little suspecting what was in store for him.
A boy of about seventeen, shabbily dressed, answered the bell.
"Is Mrs. Montgomery at home?" asked Mark, referring to a card.
"I guess so," answered the boy.
"I should like to see her."
"All right! I'll go up and ask."
The boy left Mark standing in the doorway, and went up-stairs.
He returned in a very short time.
"You're to come up," he said.
Mark followed him up the staircase and into a back room. It was scantily furnished. There was a lounge on one side of the room, and a cabinet bed on the other. These, with three chairs and a bureau, constituted the furniture.