As well, his year of birth is given as 1844, and both the 1851 and 1861 census would suggest a birth year around 1850 [D02696, D02773]. I've also found his baptism record dated 1850 [D02919]:
So, I did some research and came across this death notice from the British Whig in Kingston, dated 1866 [D07757].
The article gives a date of death of 6 July 1866 and gives an age of 16. So it's likely that he was actually born in 1850. And, the article also explains the cause of death. I have since requested a correction to the Find A Grave site with the updated information.
Sources:
[D02696] 1861 census of Canada East, Canada West, New Brunswick, and Nova Scotia, Lincoln, district 1, sub-district 1, Niagara, p. 15, 5; RG 31; digital images, Ancestry.ca
[D02773] 1851 census of Canada East, Canada West, New Brunswick, and Nova Scotia, Ontario, Lincoln County, district 22, sub-district 210, Niagara, p.65, 24; RG 31; digital images, Ancestry.
[D02919] St. Mark's Anglican (Niagara-on-the-Lake, Ontario, Canada), "Baptism - Charles Doritty"; Archives of the Anglican Diocese of Niagara, Hamilton.
[D07465] St. Mark's Cemetery (Niagara, Lincoln, Ontario).
[D07757] "Died" British Whig, 16 July 1866; p4, col 7. Digital images
