Okay, so you've just created a new feature and you have enough faith in it to spotlight it on 2 of the first 3 covers in which the feature appears. So what do you do after two exciting adventures? Well, my first choice would NOT be to do an entire story in which your hero doesn't appear in his trademark gas mask outfit once! But they did. In spite of the fact that Sandman appears in full regalia on the wonderful moody cover...he is TECHNICALLY nowhere to be found in the story of THE THREE SANDMEN as reprinted from poorly scanned pages below.
Although the evil Oriental is still a popular theme, dinosaurs show up in not one but two strip this time out, also. Perhaps due to the popularity of ALLEY OOP?