Our ancestor Isaac Kerby lived at Barclay Court which is where this chap died
Is your ancestor's father's name William ?
add:
The Isaac in the 1851 (b.c. 1872 and living Barclay Court), seems to have been bpt Clerkenwell 5 May 1771, Parents were Isaac and Sarah. Was he the Isaac Blanch who died in 1851? Also, was the father, Isaac, the one buried in 1810?
You seem to have a lot of Kerbys in Barclay Court. Land Tax, Apprenticeship fees.
You've probably got all these though.