The Sea People/Witch's Daughter — Richard S. Shaver

THE SEA PEOPLE -- Everything in this story is precisely fact. The extra-terrestrials, half-fish and half-human, their space traveling submersibles filled with the water they breathe, their origin on Venus, my contact with them, all are true. The Limping Hag, having been beaten on Venus, fled to Earth to set up her empire on the sea bottom. When she made war on the mer-people, she had to fight in the oceans of two worlds…! WITCH'S DAUGHTER -- Tom Kent caught a lovely sneak thief in his room, but when he saw what was on her back, he went with her with fists clenched for battle. He couldn't dream what he would find when he followed this lovely girl into the back room of the little store and down the musty stairway Originally published in Amazing Stories in August 1946 and June 1947.