New South Wales Government Gazette · Government of New South Wales
In the will of John Bull, late of Bull's Hill, near Liverpool, in the Colony of New South Wales, gentleman, deceased.
NSW Government Gazette, 7 Sep 1880. Australian Star 20 Apr 1906 (Trove 229647308) has 'Battle of Bull's Hill ... Liverpool Camp'. Explicit coordinates are required because the name geocodes to a namesake (Wikidata Q21894855) far outside NSW.