Me again
Had a look at the voters list for St Clement's
John Pring 1/1/1774 to 1805 at Clare St /Yeates St(all alley of) tripeman on the voters lists.
Replaced by a Thomas Pring in 1806 at same address ,may well be worth looking for a will.
Also William Pring 1/1/1749 jeweler Eagle St.
London lives website has various documents for him from 1770.
Does London have a guild of Butchers,they might have records for him?
And FindMyPast has 2 burials 1804/1806 which might be him at St Clement Danes.Can't check if they give an age because I don't have a sub.
Ciderdrinker