Isabel's mother, Anne Marie (or Anna Maria), was a daughter of Alexander Powell MP,[2] a Tory member of parliament for Downton, Wiltshire.

[4] Her parents returned to England living in Guildford, Surrey, where Baker was active in the National Union of Women's Suffrage Societies and a founding member of the local branch.

[1] For her organising of women's labour during World War I, she was appointed Member of the Most Excellent Order of the British Empire (MBE) in 1920.

[5] She returned to New Zealand and built a house at Halfmoon Bay on Stewart Island called Moturau Moana, and used a checklist by botanist Leonard Cockayne to populate it with all the local indigenous plants.

[1] For her work in England during World War I, she was posthumously inducted into the Hall of Fame of Samuel Marsden Collegiate School in 2015.