It was a September evening, and not yet seven o’clock, but the day had been a dreary one, and a dense drizzly fog lay low upon the great city. Mud-colored clouds drooped sadly over the muddy streets. Down the Strand the lamps were but misty splotches of diffused light which threw a feeble circular glimmer upon the slimy pavement. The yellow glare from the shopwindows streamed out into the steamy, vaporous air, and threw a murky, shifting radiance across the crowded thoroughfare. There was, to my mind, something eerie and ghostlike in the endless procession of faces which flitted across these narrow bars of light⁠—sad faces and glad, haggard and merry. Like all human kind, they flitted from the gloom into the light, and so back into the gloom once more. I am not subject to impressions, but the dull, heavy evening, with the strange business upon which we were engaged, combined to make me nervous and depressed. I could see from Miss Morstan’s manner that she was suffering from the same feeling. Holmes alone could rise superior to petty influences. He held his open notebook upon his knee, and from time to time he jotted down figures and memoranda in the light of his pocket-lantern.