The Dictionary of Australasian Biography/Challis, John Henry
Challis, John Henry, was a native of England, and emigrated to Sydney, where he became a clerk in the employment of Messrs. Flower & Marsden. In 1842 he was admitted a partner in the firm, but left for England in 1855, revisiting the colony once subsequently. He died in 1880, leaving the greater part of his property to the University of Sydney, subject to his widow's life interest. She died in 1888, when the large fund became available for the endowment of a number of new chairs, named after their founder.
Challis, John Henry (p. 86). Mrs. Challis died on Sept. 27th, 1884.