Thank you for looking, I haven't been able to find him either.
He didn't appear on the 1841 census so was born after 6 june 1841.
early October 1840He was buried on 6 july 1920 age 78, which is likely to make his birthday after the beginning of July 1841, assuming 3 to 4 days between death and burial.
On 1861 census he is 19, 1871 - 30, 1881 - 39, 1891 - 49, 1901 - 59, 1911 - 69.
The 1871 aberration can't be due to difference in census date 2nd April in 1871, but also 2nd in 1911 and even earlier at 31 March in 1901. His wife was a year older, so I guess 1871 was a mistake and 30 was put down for both.
If my maths is right the latest he could be born is 30 March 1842, therefore conception between early October 1840 and late June 1841.