Cool, Ryan, is that right about Antonio Neira doing monster makeup specifically? Did you get that info off imdb or have you seen it elsewhere?

First foto I ever saw from CASTLE OF THE MONSTERS was in Famous Monsters #20 (1962), that pic with the creepily blank-faced Frankenstein monster towering over pretty Evangelina Elizondo. The rest of the monsters in it are a little spotty, but at least it would be neat to be able to confirm this particular Mexican film craftsman as a monster specialist of that era.