On the death of her father in 1867, Elizabeth Macarthur-Onslow inherited a share of his property, 'Camden Park' in Menangle, New South Wales. She also inherited city properties and land at Taralga and Sutton Forest. Having studied developments in the dairy industry overseas, Macarthur-Onslow installed twelve dairies and a creamery at Camden Park. Later she added a piggery and experimented in sericulture. She was a member of the Society for the Prevention of Cruelty to Animals, and a great local patron. She died in 1911 during a visit to England.
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