THE ADVENTURE OF THE DANCING MENHOLMES HAD BEEN SEATED FOR SOME HOURS IN SILENCE WITH HIS LONG, thin back curved over a chemical vessel in which he was brewing a particularly malodorous product. His head was sunk upon his breast, and he looked from my point of view like a strange, lank bird, with dull gray plumage and a black top-knot. “So, Watson,” said he, suddenly, “you do not propose to invest in South African securities?” I gave a start of astonishment. Accustomed as I was to Holmes’s curious faculties, this sudden intrusion into my most intimate thoughts was utterly inexplicable. “How on earth do you know that?” I asked. He wheeled round upon his stool, with a steaming test-tube in his hand, and a gleam of amusement in his deep-set eyes. “Now, Watson, confess yourself utterly ta