One World Tree has him dying in January 1841. This is plainly wrong, as he is still alive at the 6 Jun 1841 census.

As Joseph and Mary Ann had another child, Abraham William, it is likely that Abraham (abt 1838) had died by then. A death that matches is:
1847 Mar Wallingford 6 227
And yes, both the birth and death entries really have the sam page number.

SP 6 Sep 2008