Caecilly Island is an island located off the coast of Northmoor in the Warp in the West and Glenumbra in the Alliance War that was plunged into the Void by Mehrunes Dagon, Daedric Prince of Destruction and Revolution.
Chimere Graegyn of the Direnni Hegemony dared to scheme against Mehrunes Dagon, he won, and Dagon fell into Oblivion. However, Dagon double-crossed Graegyn by plunging Caecilly Island into the void with all of his friends and family dying in a painful yet swift death. The screams still haunted Chimere Graegyn while he suffered from progressive aging and arthritis.
- According to the Imperial-Library, the Harvest's End, 3E 172 version of the book details the events of An Elder Scrolls Legend: Battlespire, which takes place between 3E 398[OOG 1] and 3E 433. This would contradict the Harvest's End (2E Book) version since this version existed before the mentioned events in the book. This could just be a mistaken by the developers since they imported books from past games into The Elder Scrolls Online without a second thought. The same issue happened with The Lusty Argonian Maid and Immortal Blood.
- It is unknown whether Caecilly Island was made into some kingdom in High Rock or if it was integrated into the Northmoor Kingdom.