From The Arthur Conan Doyle Encyclopedia
Leo Edward O'Mealia (31 march 1884 - 7 may 1960) was an American cartoonist. He was born in LeRoy (New York). He started as a sports cartoonist for the Rochester Herald, the Rochester Times, The Globe and the New York Daily News. In most of his drawings he added a little friendly frisky lion which became his trademark.
Between 1930 and 1931, he did 807 illustrations for 9 Sherlock Holmes short stories (from The Memoirs of Sherlock Holmes) written by Arthur Conan Doyle. In some of these illustrations he signed as Leo.