Judy’s Pony

Esta de Fossard (b.1934) was born in Melbourne. She’s written picture books under her own name, and under her pseudonym of Estelle Grey, the four book Julie Gordon series, about a teenage girl. One of the books, Julie Gordon: the Pony Club Camp is a horse story. In other volumes of the series, Julie gets to be an exchange student, go in for the school fashion contest, and confound smugglers.

Under her own name, Esta de Frossard wrote several picture books, many of which were illustrated by Haworth Bartram. She was educated at the University of Melbourne, and taught English at Lauriston Girls' School, Melbourne. After her marriage, she emigrated to America, where she wrote on writing for television and radio.

Finding the book
Not many copies about, but are reasonably priced when they do turn up.

Sources and links
Austlit
Equitainment