From A Wiki of Ice and Fire
Strange Stone is a manuscript written by Maester Theron that postulates that both the Seastone Chair and the ancient fortress at Battle Isle that serves as the foundation for the Hightower of Oldtown were constructed by Deep Ones, a race of half-men sired by creatures of the sea upon human women. Theron based his claims on the similarities of the black stone of the Seastone Chair and that of the fortress. The manuscript states that these Deep Ones are the source for the legends of merlings and their fathers for the Drowned God of the ironborn.
The manuscript contains lavish, detailed, and somewhat disturbing illustrations, but Maester Yandel also considers the text impenetrable in some parts due to Theron's little skill with words.
- ↑ 1.0 1.1 The World of Ice & Fire, The Reach: Oldtown.