Cosmo, The Phantom of Disguise (Detective Comics #3, 1937)
Sven Elven was an American artist who worked in the comic book industry during its early days in the 1930s. He drew features like 'Captain Quick', 'Cosmo, The Phantom of Disguise', 'Marco Polo', 'Pirate Gold', 'Three Musketeers' and 'Treasure Island' for National/DC, and additionally worked for Centaur ('Miraco the Great') and Fawcett ('El Carim', 'Jungle Twins').