Keeping his secret at Wayne Manor, Bruce Wayne was the original Batman, right?
Well, no, not really, as readers found out in Detective Comics #195 (May, 1953) under a cover by Win Mortimer!
But, who was this masked man?
The Original Batman
For a while, Marmon allowed Batman to operate, but a conniving criminal, John Vulney, worked on Marmon's vanity, convincing him to have him petition Commissioner Gordon to keep Batman from working in Gotham City (as Marmon then did, first just to showcase his acrobatic talent, then trying as an incompetent crime fighter).
Batman then took off with Robin, outside the city. Finding a circus, Batman planned to take over as their acrobatic act, while he had Robin do a little research around local circuses (due to Dick's connection to them from his Flying Graysons days).
here!), but, that Bruce Wayne WAS the first Robin (told here!).