Henry - killed in action. From Commonwealth War Graves Commission
BALDEY, HENRY
Rank: Lance Corporal
Service No: 20622
Date of Death: 21/03/1917
Age: 25
Regiment/Service: York and Lancaster Regiment 2nd Bn.
Grave Reference: VI. C. 21.
Cemetery: BETHUNE TOWN CEMETERY
Additional Information: Son of Mr. and Mrs. W. Baldey, of 67, Franklin Rd., Brighton.
Ages for Mary and Walter from GRO Death Index. Note CWGC has slightly different date of death for Henry compared to gravestone.