I had them continue to do so.

I figured that sooner or later Von der Herts would get in touch with her.

I was right.
And when at last I saw with my own eyes the man who must, beyond all question, be Von der Herts, I was astounded, my dear Inspector, I was overwhelmed." "Yes ?" said Bray.
"I set to work then in earnest to connect him with that night in Adelphi Terrace.

All the finger marks in the captain's study were for some reason destroyed, but I found others outside, in the dust on that seldom-used gate which leads from the garden.

Without his knowing, I secured from the man I suspected the imprint of his right thumb.