 A young woman enters this other world, becomes the empress of a society composed of various species of talking animals, and organizes an invasion back into her world complete with submarines towed by the "fish men" and the dropping of "fire stones" by the "bird men" to confound the enemies of her homeland, the Kingdom of Esfi.The work was initially published as a companion piece to Cavendish's "Observations upon Experimental Philosophy" and thus functioned as an imaginative component to what was otherwise a reasoned endeavour in 17th-century science.It was reprinted in 1668.