Looking for Information on John Downing (Born 1805) (no replies)

I am looking for information on John Downing, Born 1805, in Pennsylvania. His wife's name: Jane (Born 1812). They had 7 children:
Martha (Born 1830)
William M (Born 1832)
John M. (Born 1837)
James C (Born 1840
Elizabeth H (Born 1841)
Sarah J (Born 1843)
Joshua (Born 1847)

The last known township John Downing listed during the 1860 Federal Census was: Richland, Venago (Porterfield post office).

Thank you.
Liz Downing