Toni Gayle is sort of like a different version of the Phantom Lady. She also seems similar to the brunette that turned up in Captain America stories around the same time, at least in appearance. That character was likely as not to be one of the bad guys.
This story was originally published in 1949, and the art is by L. B. Cole.
Reblogged from http://pappysgoldenage.blogspot.com/