Sting (Middle-earth)
Sting has the magical ability to detect orcs or goblins nearby, glowing blue in their presence, as it did when the Fellowship encountered orcs in the mines of Moria. Tolkien establishes this as a common property of First Age Elf blades, particularly those forged in Gondolin. Sting is also exceptionally sharp. Bilbo manages to thrust it without effort deep into a wooden beam at Rivendell. Frodo also wounds a troll in Moria, after Boromir notches his own sword with his attempt. Sam uses Sting to cut through the giant spider Shelob's strong webs with ease, and also wound the spider, driving it away from the paralyzed Frodo.
J. R. R. Tolkien
Tolkien also cited H. Rider Haggard's novel "She" in a telephone interview: "I suppose as a boy "She" interested me as much as anything—like the Greek shard of Amyntas [Amenartas], which was the kind of machine by which everything got moving." A supposed facsimile of this potsherd appeared in Haggard's first edition, and the ancient inscription it bore, once translated, led the English characters to She's ancient kingdom. 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.