Alan,
There is a Chelsea marriage Dec 1867 1a/372 for a Thomas Humphries. How sure are you of the bride's name? There are only two brides listed on FreeBMD with this ref but neither appear to be yours. This is the only Chelsea marriage for Humphries which is coming up between 1862 and 1870. They could, of course have married outside of Chelsea, but as their first child was born there, this is where I've looked first.
Birth ref for Gertrude May Humphries - Chelsea Sep 1867 1a/239 so marriage probably before this date....?
Not sure if you have 1881 census but here it is
218 Comml Road, Camberwell, Surrey
RG11/0688/70/17
Thos Humphries Head Male 37 Shifnal, Shropshire, India Rubber Air Ball Man emplying 4 girls
Deborah Humphries Wife Female 36 St Lukes Middlesex
Gertrude My Humphries Dau 13 Chelsea, Scholar
Nelly Humphries Daur 11 Fulham, Scholar
Robt Humphries Son 9 Hounslow, Scholar
Mable Humphries Daur 7 Bermondsey, Scholar
Rachel Humphries Daur 5 Peckham, Scholar
Arthur Humphries Son 3 Peckham, Scholar
Florence Humphries Dau 7m Peckham
Martha Watson Visitor Widow Female 67 Deptford, Kent, Monthly Nurse
All above spelt as per census so errors are in census, not typing errors.
Also, death of Deborah Humphries Jun 1904 (age 59) Lewisham 1d/600
Not sure of any of this helps, but its all I could find with the info you have given,
Good luck,
Claudia
PS What a great occupation Thomas had!!
