 Critics have compared this device to the "Testament of Isildur" in "The Lord of the Rings" and to Tolkien's efforts to produce as an illustration a realistic page from the "Book of Mazarbul".Critics starting with Edwin Muir have found resemblances between Haggard's romances and Tolkien's.Tolkien wrote of being impressed as a boy by S. R. Crockett's historical novel "The Black Douglas" and of basing the battle with the wargs in "The Fellowship of the Ring" partly on an incident in it.