A few mentions in passenger lists:
24 February 1930: Edgar Watson travelling alone on the Montagua from Dartmouth to Kingston. He's a 29 year old engineer. Address The Foundry, Elam, Morayshire
2 September 1939: On the Orduna from Liverpool to Kingston (in First Class):
Edgar Watson, 38 Surveyor
Emma Edith Watson, housewife
Helen Marguerite and Edith Marilyn both 16 months
Address 11 Victoria Road, West Kirby Cheshire
There are some more I think..still looking