"I shall never do that," I answered; "you have brought detection as near an exact science as it ever will be brought in this world."
My companion flushed up with pleasure at my words, and the earnest way in which I uttered them. I had already observed that he was as sensitive to flattery on the score of his art as any girl could be of her beauty.
"I'll tell you one other thing," he said. "Patent leathers [10] and Square-toes came in the same cab, and they walked down the pathway together as friendly as possible--arm-in-arm, in all probability. When they got inside they walked up and down the room--or rather, Patent-leathers stood still while Square-toes walked up and down. I could read all that in the dust; and I could read that as he walked he grew more and more excited. That is shown by the increased length of his strides. He was talking all the while, and working himself up, no doubt, into a fury. Then the tragedy occurred. I've told you all I know myself now, for the rest is mere surmise and conjecture. We have a good working basis, however, on which to start. We must hurry up, for I want to go to Halle's concert to hear Norman Neruda this afternoon."
This conversation had occurred while our cab had been threading its way through a long succession of dingy streets and dreary by-ways. In the dingiest and dreariest of them our driver suddenly came to a stand. "That's Audley Court in there," he said, pointing to a narrow slit in the line of dead-coloured brick. "You'll find me here when you come back."
Audley Court was not an attractive locality. The narrow passage led us into a quadrangle paved with flags and lined by sordid dwellings. We picked our way among groups of dirty children, and through lines of discoloured linen, until we came to Number 46, the door of which was decorated with a small slip of brass on which the name Rance was engraved. On enquiry we found that the constable was in bed, and we were shown into a little front parlour to await his coming.
He appeared presently, looking a little irritable at being disturbed in his slumbers. "I made my report at the office," he said.
Holmes took a half-sovereign from his pocket and played with it pensively. "We thought that we should like to hear it all from your own lips," he said.
"I shall be most happy to tell you anything I can," the constable answered with his eyes upon the little golden disk.