"All right, sir," and the three detectives ascended the first flight of stairs in company.
At the landing Quackenbush and the other detective left Old Spicer and placed themselves in the vicinity of Bissell's room. The old man ascended to the third floor, and, hastening to No. 36, knocked on the door.
"Who's there?" came in a low whisper from the other side.
"It's me, Adam—Old Spicer."
"Thank goodness!" and the door was hastily opened and the old detective admitted.
"I'm mighty glad you've come," whispered Killett, "you're just in time. Chamberlain has been waiting in the room under this ever since I've been here; but the man he came to see was out and has only just returned."
"I am fortunate, then," said Old Spicer.
"Yes, jump up on the table and mount one of the chairs."
Old Spicer did so, while Killett took possession of the other chair.
In another moment they were listening at the ventilator.