Moses was buried from the workhouse at
St Giles in the Fields. This parish is between Marylebone/Westminster and Holborn. Although part of it falls into the present-day London Borough of Camden, it would not have been considered 'Camden' in 1837.
http://www.workhouses.org.uk/StGiles/You might want to check the parish poor-law records for
St Giles in the Fields. A workhouse admission or a settlement examination in the years leading up to Moses' death might help identify him. The records are held at London Metropolitan Archives (LMA), and some are on Ancestry.
(1) Parts of two Admission/Discharge registers for St Giles in the Fields workhouse 1818-1843 are indexed in Ancestry's database
London, England, Workhouse Admission and Discharge Records, 1659-1930. A quick search for Moses produced no result, but these records are incomplete online.
(2) Settlement examinations for the parish of St Giles in the Fields 1830-1868 are online here ...
London, England, Poor Law and Board of Guardian Records, 1430-1930 > Camden > Holborn > Settlement Papers > Settlement examinations 1830-1868The examinations are recorded in rough
chronological order, and there is no name-index online. So you would have to read through each register from 1830 up to his date of death in 1837 (about 12 registers). Again, there are gaps in the collection, not just on Ancestry but in the original collection as held at LMA.
There is an index to these settlement examinations at LMA (under
HOBG/502/092). But it's currently classified as Unfit, and I suspect there is no film.