Tom
There seems to be several William Sterlings on the Thames River at Tilbury Ontario. My ancestry goes back to William
Sterling married to Elizabeth Peck pre 1800. This William served in the Kent Militia (war of 1812). The Church of St. Pierre on the Thames (a la Tranche) was not built until 1802.
Perhaps---your William is father or uncle of mine. Do you have any further information???????