Versions of such tales, including the origins of Gandalf and the other Istari (Wizards), the death of Isildur and the loss of the One Ring in the Gladden Fields, and the founding of the kingdom of Rohan, help expand knowledge about Middle-earth.
As versións de historias como as orixes de Gandalf e os Istari (os Magos), a morte de Isildur e a perda do Anel Único nos Campos Ledos, e a fundación do reino de Rohan axudan a aumentar o coñecemento sobre a Terra Media.