John Clarke was the informant when his mother Jane died in 1838, both were residing at 47 Pleasant Place, Lambeth, Surrey at the time.
Googling that address, it had two hits both to London Gazette entries for John Clarke of 47 Pleasant Place, being admitted to Marshalsea debtors prison.
He is not there on the 1841 census and have been unable to find him on 1841 and 1851 censuses.
Jane's death certificate said she was widow of Matthew Clarke, but John does not show on IGI as a child to this couple, perhaps not surprising as sons Henry and Richard were not baptised until in their 20's.
Hoping some Chatter may have come across John, who was a jobbing slater and slater on above Gazette notices.
Thanks,