Hi, Interesting info. My Dad who started this thread actually passed away in 2004. So I will be taking over the research.
The surname back then was Childe (with an E) Siila also lived in Fiji when Harry left for the war in 1917. His next of kin on record being -
Mrs Siila Childe (wife), Levuka, Fiji. She also had a sister Lizzie who married a Captain Wal Wilson - in Fiji also.
Thank you for the follow-ups.