“Your hiding-place, my dear Watson, was very faulty. You should have been behind the hedge, then you would have had a close view of this interesting person. As it is, you were some hundreds of yards away and can tell me even less than Miss Smith. She thinks she does not know the man; I am convinced she does. Why, otherwise, should he be so desperately anxious that she should not get so near him as to see his features? You describe him as bending over the handlebar. Concealment again, you see. You really have done remarkably badly. He returns to the house, and you want to find out who he is. You come to a London house agent!”

“What should I have done?” I cried, with some heat.