If this is your Michael Terry, you could contact the cemetery if they have records that far back and see who gave the information on his burial.
Buried: St John's Roman Catholic Cemetery, Osgoode Tsp, Carleton County. Reference: OT-86-17
A Julia Terry is buried there as well. Same Reference.
Also a Margaret Terry. Same Reference.http://ocfa.islandnet.com//
Here they are in 1861 census in Osgoode Carleton
M, Ireland, 62
M, Ireland, 59
Jul, Canada West, 28
M, CW, 20
M?, CW, 13 [female]
E, USA, 7
E, USA, 5
The last two would be Edward and Ellen Lewis on 1871 census.
There is no 1851 census from Osgoode. Either lost or destroyed.
I did not find a death registration of any of the above peoples nor did I find a marriage for Michael Lewis.
Finally found them on 1881 census
Michael, 40, Ont, farmer, Catholic
Margret, widow, 82, Ireland,
Julie, 48, Ont
Adwerd, 27, Ont [this must be Edward Lewis]
Finally found one death
Margaret Terry, died 21 August 1882, aged 83, farmer's wife, b Ireland, died of old age, informant: Michael Terry, son of deceased of Osgood. Roman Catholic.
Last name was transcribed as Ferry. I sent in a correction.