A few pages mis-filed in the MAR section of the WW1 Service Records (WO 363):

Henry SEWELL joined the Royal West Kents on 19 June 1906, declared age 18y 2m, born Gravesend.
Taken POW during the Great War (possibly 1917), discharged 1920.

No useful genealogical info.

Anc****y, MAR, pages 2-17 & 40-43