"In such work as this we rely upon the sergeant and you." "Then I'd like to take a look at those heel prints also." Dick thought he detected a quiver of excitement or emotion in the voice of Shepard, always so calm and steady hitherto, and he wondered.
Nevertheless he asked no questions as he led the way out of the ravine.
The sergeant showed the heel prints to Shepard, and beyond question they had been made by a woman.

By careful scrutiny they found a half dozen more leading in a diagonal direction up the side of the mountain, but beyond that the ground was so hard and rocky that they could discover no further traces.
"You agree with me that the tracks have just been made ?" said the sergeant to Shepard.
"I do," replied the spy, his voice showing growing excitement, "and I think I know who made them.

I didn't believe it at first.

It seemed incredible.

I want to try a little experiment.