"In the State, War and Navy Building."
"Good. I want to go to the solarium, put a light on the place where the President's pillow was last night, and mark that pane of quartz we were looking through. Then we'll join the detail."
Dr. Bird placed the light and walked with Carnes across the White House grounds. Bolton's badge secured admission to the State, War and Navy Building for the party and they made their way to the office of the Assistant to the Adjutant General.
"Did you mark the pane of glass through which you flashed your light last night, Bolton?" asked the Doctor.
The detective touched one of the panes.
"Good," exclaimed the Doctor. "I notice that this window has hooks for a window washer's belt. Get a life belt, will you?"
When the belt was brought, the Doctor turned to Carnes.
"Carnes," he said, "hook on this life saver and climb out on the window ledge. Take this piece of apparatus with you."
He handed Carnes a piece of apparatus which looked like two telescopes fastened to a base, with a screw adjustment for altering the angles of the barrels.