The Henry Thomas Carter who died in Holborn in 1877, aged 42, could be the same one?
I managed to find 96 Barnsbury Road in 1871:
RG10/254 folio 64 page 35 (and onwards).
George Sheer (or Speer?), 31, school master b. Walworth
Eliza, 29, b. Brighton
Walter H, 3, b. Islington
next page
Joseph Chattell, 38, warehouseman, b. Islington
his wife Mary, 31, b. Stoke ? Clare
also
James Skinner, 32, tinman?, b. Bristol
wife Lydia J M, 30, b. Bloomsbury
Lydia A, 5
Margaret, 1
(both b. Islington)