Some birth registrations
SILVA, MARIA SARTOR
GRO Reference: 1896 M Quarter in WANDSWORTH Volume 01D Page 764
SILVA, MARY GRACE ELIZABETH SARTORI
GRO Reference: 1897 J Quarter in WANDSWORTH Volume 01D Page 710
Maria died
Deaths Mar 1896
Silva Maria 0 Wandsworth 1d 421
SILVA, CATHERINE MARIA JOHANNA SARTORI
GRO Reference: 1901 D Quarter in WANDSWORTH Volume 01D Page 769
SILVA, JOSEPH MARK SARTORI
GRO Reference: 1903 D Quarter in WANDSWORTH Volume 01D Page 750
For some reason Joseph is not on the 1911
SILVA, FIORENZO SARTORI
GRO Reference: 1905 M Quarter in WANDSWORTH Volume 01D Page 763
SILVA, LOUIS SARTORI
GRO Reference: 1906 J Quarter in WANDSWORTH Volume 01D Page 737
The 1911 indicates nine children born, five still living. I've only been able to find six children. Perhaps the other three were born in Italy and died there?