Hi
This could be him in 1891
Chichester barracks
Henry Elphick  soldier single  19 Private Royal Sussex Regiment Barkham, Sussex
1891
Near Barcombe Mills Station, The Lawn, Barcombe
Henry Elphick  hesd mar 48  Millers Lab   Sussex, Barcombe
Ellen    "         wife  mar 43                   "         Buxted
Kate    "          dau        10                  "        Barcombe
Polly    "          dau         8                   "           "
Same family in 1881 RG12/846  188/13 which includes
Harry Elphick  born 1872 Barcombe
Added  apologies if you already have , have just seen your other post, is it his Army Records you were after?
Best wishes
Cathy