|13 Feb 1870 birth of John Gilmore Garnett
Ontario Vital Records 1870 Births Cavan Twp, Durham Co., no.10802
According to the Ontario Locator http://www.geneofun.on.ca/db.php there is only one Cavan, which is Cavan Twp now in Peterborough Co. The record shows it in the United Counties of Northumberland & Durham. Apparently it was part of Durham Co. until 1973.
Source: FHL 1844885, Archives of Ontario MS929_3