Which preposition to use with goulburn

in Occurrences 2%

I met Goulburn in the Park this morning.

about Occurrences 1%

At the Cabinet dinner spoke to Lord Melville and Goulburn about the embarrassments of the civil servants.

on Occurrences 1%

However, it served its purpose, and my parents wrote back that, did I reach Goulburn on a certain day, a neighbour who would be in town then would bring me home.

Which preposition to use with  goulburn