Which preposition to use with kinsale

in Occurrences 2%

The Leopard left first, then the Agamemnon, then the Susquehanna and the Niagara last; and at this moment we are off the Head of Kinsale in the following order: Niagara, Leopard, Agamemnon, Susquehanna.

Which preposition to use with  kinsale