Beware, where mermaids bred! Elizabeth Merkuryevna Boehm (Endaurova) (1843-1914)

The picture has something of this: paper, vintage, people, retro, antique, man, visuals, bill, text, portrait, picture frame, design, woman.
Perhaps it’s a painting of a boy and a girl swimming in a body of water with words written on the bottom of the picture.