We will ring if we want you." A few minutes later we were in the study.

Holmes had brought with him the carpet slippers from the hall.

As Ames had observed, the soles of both were dark with blood.
"Strange!" murmured Holmes, as he stood in the light of the window and examined them minutely.

"Very strange indeed!" Stooping with one of his quick feline pounces, he placed the slipper upon the blood mark on the sill.

It exactly corresponded.