"The Second War of the Worlds" is a sequel to "Kar Kaballa" in which Wells' Martian invaders (from "War of the Worlds") have taken a step sideways to Thor (the Anwwn-equivalent of Mars) to attempt the invasion of Anwwn. There are primitive submarines, dirigibles, and Old Souls involved, and the Martians are once again defeated. Two men from Earth, Mr. H and Dr. W, assist MacBride defeat the Martians; the story makes it clear that these characters are obviously Sherlock Holmes and Dr. John Watson.