On FMP website I have found travel info for

Frederick Ward age 29 Farmer
Margaret Wardage 27
Frederick Ward age 1
John Ward age 3

All travelling to Quebec,Montreal from Southampton on 5th July 1923 on ship called "Melita"

Last known address in Uk was 60 Romford Street, Barking
Here are their births

Births Mar 1920 (>99%)
Ward John B Costigan Romford 4a 1467
Births Dec 1921 (>99%)
Ward Frederick H Costigan Romford 4a 1017