Oh, here it is!" He stooped swiftly and picked up a key from the floor.

"Robert must have taken it out after locking the door." "Perhaps it fell out when we were breaking in the door," observed the doctor.
"Of course.

I forgot that.

I notice that the clock is stopped at half-past nine." He bent down to examine it.

"My brother kept private papers in the clock-case," he added.