Dear JM
Have just had a breakthrough. Wyndham Francis Armstrong was born 1866, Bowen, Queensland & was a nephew of Dr. Wyndham Fitzgerald Armstrong.
Wyndham Francis married 1894 at Scone, New South Wales, Margaret Sarah McDonald. There is a website for the McDonald family of Margaret Sarah & it doesn't seem that the McDonalds & my Macdonalds are connected although I will keep an open mind as the spelling of the name varies.
Wyndham Francis & Margaret Sarah had a daughter Kathleen Armstrong born in Qld in 1899 & N.S.W. records show 2 sons born at Scone (1895 & 1896) to Wyndham F Armstrong & Margaret/Margaret S.
NSW records show a marriage at Scone in 1894 for Wyndham F Armstrong & Margaret T McDonald & Wyndham F Armstrong married 1894 at Scone, Margaret Macdonald. Many thanks for your interest. Grasc