Cthäat Aquadingen

The Cthäat Aquadingen, possibly meaning Things of the Water (As Aquadingen can be translated from Dutch into Water/Aqua things), was created by Brian Lumley for his short story "The Cyprus Shell" (1968). This text, by an unknown author, deals with Cthulhu and other sea-horrors, such as Inpesca. It also contains many so-called Sathlattae, rituals and spells related to Ubbo-Sathla. It is first mentioned as appearing in northern Germany around 400 AD. A Latin version was apparently written between the 11th and 12th century, as was an English translation that appeared sometime in the 14th century.