In the dungeon

Pujolar and his contemporaries would produce art along general themes which was later paired with a book of the publisher's choice, but I don't know whether this "jailer and captive" one made it that far. Pujolar is the subject of the 2020 documentary Pujolar: Los Muertos Aun Recuerdan Su Nombre (The Dead Still Remember His Name). He produced many pieces like this for Bruguera, a major publisher of Spanish comics and pulp novels in the mid 20th century. The most surprising thing is that it is just a little over twelve inches tall, and thus very detailed for that size.