From The Casebook of Erich Zann, Consulting Detective.
...The absence of Conan Doyle / H. P. Lovecraft cross-overs is not satisfactory.
Leaning back in his armchair of an evening, he would close his eyes and scrape carelessly at the fiddle which was thrown across his knee. Sometimes the chords were sonorous and melancholy. Occasionally they were fantastic and cheerful. Clearly they reflected the thoughts which possessed him, but whether the music aided those thoughts, or whether the playing was simply the result of a whim or fancy, was more than I could determine. I often heard sounds which filled me with an indefinable dread—the dread of vague wonder and brooding mystery. It was not that the sounds were hideous, for they were not; but that they held vibrations suggesting nothing on this globe of earth, and that at certain intervals they assumed a symphonic quality which I could hardly conceive as produced by one player.