Interesting. It appears that they had 5 children - Leonard, Lena, John, Florence & Valerie.
I have one possible Lily SQUANCE shown in the 1911 census aged 5, apparently the daughter of a Sarah SQUANCE with sister Rachel and a brother H. - 11 months, all born Glamorgan.
I believe the father to be Henry E. SQUANCE (b 1883 Penrhiwceiber) who married Sarah MORGAN in 1900. Henry's father, John was born 1857 as John QUANCE - his people were from Somerset and after a few years in Wales became SQUANCE.
Unfortunately - I don't know any more!