Ralph Wilson, a Scotsman, was born in 1807 to John Wilson (a grocer) and Margaret French, one of six siblings. Emigrating with his parents to Canada, he eventually found his way to the Navan area and married Jessie McLeod in 1827. He set up a farm in Navan on Lot 10, Concession VII.
On April 16, 1853, Ralph was cutting timber in his bush and was struck and killed by a falling tree. Jessie, his widow, had a church built in his memory. From 1862 through 1926, the church held services, first under the Presbyterian banner, then under the Methodist one. Wilson Memorial Cemetery still remains on Colonial Road. The church itself was moved west in 1926 into the village of Navan and renovated to become Navan/Vars United Church (when the Presbyterian and Methodists churches united to become ... well, ... the United Church). Windows, the organ and the pulpit came out of the Wilson church into the new church on Smith Street.
The cache is within the cemetery bounds, and so I invite you to be respectful of the surroundings, and please use the daylight hours to find the cache. You are looking for a small tube; I think some call them "Lisa" tubes. It contains only a log, and so bring your own writing implements.