It was one o'clock when we left No. 3, Lauriston Gardens. Sherlock Holmes led me to the nearest telegraph office, whence he dispatched a long telegram. He then hailed a cab, and ordered the driver to take us to the address given us by Lestrade. "There is nothing like first hand evidence," he remarked, "as a matter of fact, my mind is entirely made up upon the case, but still we may as well learn all that is to be learned." "You amaze me Holmes," said I. "Surely you are not as sure as you pretend to be of all those particulars which you gave." "And his age?" I asked. "Was the street empty then?"