“A singular set of people, Watson⁠—the man himself the most singular of them all. I managed to see him on a plausible pretext, but I seemed to read in his dark, deep-set, brooding eyes that he was perfectly aware of my true business. He is a man of fifty, strong, active, with iron-gray hair, great bunched black eyebrows, the step of a deer and the air of an emperor⁠—a fierce, masterful man, with a red-hot spirit behind his parchment face. He is either a foreigner or has lived long in the tropics, for he is yellow and sapless, but tough as whipcord. His friend and secretary, Mr. Lucas, is undoubtedly a foreigner, chocolate brown, wily, suave, and catlike, with a poisonous gentleness of speech. You see, Watson, we have come already upon two sets of foreigners⁠—one at Wisteria Lodge and one at High Gable⁠—so our gaps are beginning to close.