Where did Sherlock Holmes go during his famous disappearance between his death at Reichenbach Falls and reappearance in Baker Street, three years later? God of mystery Keisuke Matsuoka contends that it was in the Far East—in Japan, to be exact. In 1891, Nicholas Alexandrovich, the Tsarevich of Russia, was traveling in a fragile Meiji-era Japan on an official tour when he was almost assassin...