Name: Dr. H. Robinson
First Appearance: Batman (vol. 1) #3 (Fall 1940): "The Ugliest Man in the World"
Number of Appearances: 2
In panel 5 on page 5 in the story "The Ugliest Man In the World" in Batman #3 (Fall 1940), a car carrying bad guys (members of the "Ugly Horde") flees from police. The car speeds by a commercial building. One of the windows is labeled "Dr. H. Robinson: Dentist." Other than this, Dr. Robinson is never actually mentioned or seen in this story.
In a surprising bit of continuity, Dr. H. Robinson the dentist was actually "mentioned" again a few months later. In the Batman story published in Detective Comics #46 (Dec 1940), a sign for "Dr. H. Robinson, Dentist" is clearly seen in three separate panels on pages 10 and 11. While Robin is downtown confronting criminals hired by Professor Strange, the acrobatic hero swings on Dr. H. Robinson's sign in order to get up onto a movie marquee and take out a gunman.
At this time in Batman's publishing history, it was rare for any character (aside from Batman, Robin, and Commissioner Gordon) to be used in more than one story. The only recurring villains were the Joker, Catwoman, and Professor Hugo Strange. So the re-use of "Dr. H. Robinson, dentist" is quite unusual. Both stories that feature this dentist's sign were by the same writer and artists. Clearly the re-use of this name was not a coincidence. What was the inspiration for this name? The inker's name for these stories was Jerry Robinson. Did the artists know an actual "H. Robinson," perhaps through their association with him?