The Holborn Union had a workhouse at Mitcham, in Croydon RD.
So maybe a look at the London workhouse records on ancestry, see if there is anything for Alfred?
City Road workhouse
Admitted 2 February 1916
Alfred Jewson, Printer, C of E, born 1851. Says married.
Discharged, 5 February, as Edward Jewson, 65, to
MitchamMitcham workhouse
Admitted 5 February 1916
Alfred Jewson, Printer, C of E, born 1851.
Discharge, 9 June 1916
Alfred Jewson, 65,
Dead