Try the free search tool at familysearch.org. Might be this man.
U S Census, 1850 Stroudsburg, Monroe, PA Thomas V CurtisM 44 Eng Sophiah Curtis F 37 Eng John V Curtis M 17 Eng Mary Anna Curtis F 15 Eng Charles R Curtis M 13 Eng George E Curtis M 9 Aus William A Curtis M 7 Aus Mortimor T Curtis M 3 NY
Australia, Births and Baptisms George Edwin Curtis birth: 02 Oct 1841 christening: Oct 1841 St. Lawrence Sydney, New South Wales, Aus residence: 1841 New South Wales, Aus parents: Thomas Vincent Curtis, Sophia
William Adolphus Curtis Australia, Births and Baptismsbirth: 06 Jul 1844 New South Wales, Aus christening: 25 Aug 1844 ST. LAWRENCE. SYDNEY, NEW SOUTH WALES, AUS residence: 1844 New South Wales, Australia parents: Thomas Vincent Curtis, Sophia
New Jersey Deaths and Burials Wm. A. Curtis death: 22 May 1867Millstone, NJ birth1844Australia occupation: Clerk father's name: Thomas D. Curtis