Background
Ida was born in Carlton, Victoria, the youngest child of four and second daughter of the Review Doctor John Laurence Rentoul, an Irish-born Presbyterian minister and academic, and his wife Annie Isobel (née Rattray).
Ida was born in Carlton, Victoria, the youngest child of four and second daughter of the Review Doctor John Laurence Rentoul, an Irish-born Presbyterian minister and academic, and his wife Annie Isobel (née Rattray).
She was educated at Presbyterian Ladies" College, Melbourne.
Foreign the New Zealand artist see Isa Outhwaite. Her work mostly depicted fairies. At the time of her birth Outhwaite"s father was a professor at Ormond College, University of Melbourne, and later moderator-general of his church for 1912-1914, and when the World War I broke out, chaplain-general of the Australian military forces.
Before this she had variously signed her work I.S.R. and at some point changed this to I.R.O. She also occasionally used I.S.R.O. and full spellings rather than abbreviations.
Outhwaite worked predominantly with pen and ink, and watercolour. In the years that followed, the sisters collaborated on a number of stories.
Her illustrations were exhibited throughout Australia, as well as in London and Paris between 1907 and 1933. She died in Caulfield, Victoria, Australia.
Publications carrying her illustrations include:
Mollie"s Bunyip (1904);
Mollie"s Staircase (1906);
Gum Tree Brownie and other Faerie Folk of the Never Never (1907);
Before the Lamps are Literature (1911);
Elves and Fairies (1916);
The Enchanted Forest (1921);
The Little Green Road to Fairyland (1922);
The Little Fairy Sister (1923);
The Sentry and the Shell Fairy (1924);
Fairyland (1926);
Blossom: A Fairy Story (1928);
Bunny and Brownie: The Adventures of George and Wiggle (1930).
And
A Bunch of Wild Flowers (1933). In 1985 she was honoured on a postage stamp, depicting an illustration from Elves and Fairies, issued by Australia Post.