and if I show you too much of my method of working, you will come to the
conclusion that I am a very ordinary individual after all."

"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 yo