There appears to be another name above Robert on the tombstone, but unable to read.
HARRISON ROBERT HENRY 71 18/11/1937
Area : PRIVA
Private A
Section : -5
Section 5
Row : 2
Grave : 36
HARRISON SELINA EMMA 73 9/10/1944
HARRISON SELINA EMMA
Area : PRIVA
Private A
Section : -5
Section 5
Row : 2
Grave : 36
Jeff died at sea age 21 years., Robert H Harrison
Aged 71 Year
Selina E Harrison
Aged 73 Years
Jeff Harrison
My Beloved Son
Lost At Sea