Thanks Rupert.
I'll see what I can find re Armstrong. Children lived south of the harbour.
The Sydney Morning Herald - Friday 4 September 1942 p.10
DEATHS
ARMSTRONG, Margaret.-September 2, 1942, at her daughter's residence, 18 Clevedon Road, Hurstville, Margaret Armstrong, dear mother of Horace (Bexley), Florence (Mrs Starr, Belmore), Martha (Mrs C. Naylor, Cronulla), Muriel (Mrs P. Newbery, Hurstville), and Ida (Mrs W. Muir, Belmore), aged 94 years. Privately interred September 4, at Wellington.
Several in the rolls 1930 - 1937 but not one in Manly area. Can only be sure of the 1937 one at 18 Clevedon road, Hurstville.
Dave