The sign of four / A. Conan Doyle. The big Bow mystery, by Israel Zangwill. Big Bow mystery. Doyle, Arthur Conan 1859-1930. PZ3.D772 Si4 PR4622.S44 823.9 DOS New York : C. Scribner's Sons, 1963. 1963. 1928 Text 154 p. : eng