Doc Savage: The Forgotten Realm (The Wild Adventures of Doc Savage)

Doc Savage: The Forgotten Realm (The Wild Adventures of Doc Savage) - Kenneth Robeson A man speaking classical Latin and dressed in a toga is found in Roman ruins in Scotland, and promptly put away in a lunatic asylum.
Doc Savage and his crew investigate with the possibility the stranger may have come through time at the back of their minds.

Good pulp style novel, there's always something happening and lots of action.