The Sleuth of St. James's Square

I had to meet the obligations of professional courtesy. Captain Walker had asked me to go over the manuscript of his memoirs; and now he had called at the house in which I was a guest, for my opinion. We had long been friends; associated in innumerable cases, and I wished to suggest the difficulty rather than to express it. It was the twilight of an early Washington winter. The lights in the great library, softened with delicate shades, had been turned on. Outside, Sheridan Circle was almost a thing of beauty in its vague outlines; even the squat, ridiculous bronze horse had a certain dignity in the blue shadow.