Keppen's Tatar companions told him that this was the site (on the Nikita mys) of a monastery. Keppen approached from the state garden to the east and immediately saw the remains of a wall and further down the cave known as Khale Khoba (Kale Koba), 10 sazhens above the water line. Interested, Keppen consulted "old and new" plans of Nikita dacha, both of which named the ruin Ruskofil Kale. Keppen conjectures that the key to the whereabouts of the lost site of Fulla, mentioned in church sources as having been incorporated into the diocese of Sudak in the 12th century, was here, embedded in the name Ruskofil/Ruskoful. The site also bears the name Kastropulo. (178-179)