I can assure you that you are wasting your time in dogging my movements. I have, as you discovered last night, a window at the back of my brougham, and if you desire a twenty-mile ride which will lead you to the spot from which you started, you have only to follow me. Meanwhile, I can inform you that no spying upon me can in any way help Mr. Godfrey Staunton, and I am convinced that the best service you can do to that gentleman is to return at once to London and to report to your employer that you are unable to trace him. Your time in Cambridge will certainly be wasted.

Yours faithfully,

Leslie Armstrong.

“An outspoken, honest antagonist is the doctor,” said Holmes. “Well, well, he excites my curiosity, and I must really know before I leave him.”