I have a Joseph Kirk, d.1849 buried Hope, Derbyshire.
In the 1841 census, he is 60, therefore d.o.b. 1781.
However, his Hope St Peters gravestone has his age 73, making d.o.b. 1776.
There are at least 2 potential births, one for each date. My instinct is that a gravestone would provide more reliable data than a census return, but is this generally so?