The Black Mask by E. W. Hornung

I am still uncertain which surprised me more, the telegram calling my attention to the advertisement, or the advertisement itself. The telegram is before me as I write. It would appear to have been handed in at Vere Street at eight o’clock in the morning of May 11, 1897, and received before half-past at Holloway B.O. And in that drab region it duly found me, unwashen but at work before the day grew hot and my attic insupportable.