Which preposition to use with tor

of Occurrences 2%

To the south rose sharply and abruptly a high, pointed hill, the tor of Glastonbury.

on Occurrences 2%

From Naples they went by sea to the island of Rhodes, and thence to Alexandria in Egypt, whence they travelled as merchants to Grande Cairo, and proceeded with the caravan to Tor on the Red Sea, near the foot of Mount Sinai.

to Occurrences 1%

Dorothea's eyes, avoiding the wind, were fixed on the tor to the left, when Endymion touched her hand and pointed towards the base of the other.

Which preposition to use with  tor