"The cab in which Clark Kent..."
Storyline
Superman decides to wage war against the Cab Protective League, a firm trying to victimize the independent cab companies. But when he thinks the situation has been resolved, he comes to face a new threat: the Ultra-Humanite, a foe who gained from a scientific experiment the most agile and learned brain on Earth...a foe who seeks to dominate the world!
Story Notes
The "S" symbol first appears on Superman's cape. Oddity: Superman is overcome by a sheet of flame and states that he nearly perished in a burning cabin. Some notes & synopsis added by Craig Delich.
Paul Cassidy is credited with adding the "S" symbol to the cape (but it only appears in some panels and not others), and the pencils and inks here look like his work. Note in particular the odd flying poses of Superman in panels one and five of the final page, which are characteristic of Cassidy. He claimed that Siegel and Shuster gave both he and Wayne Boring free reign to interpret the scripts as they liked.