The Rev. Benjamin Glennie's diary makes the first direct reference to Marshall being at Glengallan in Janurary 1851. As typhus fever had been reported in Warwick he wrote..."I could not return thither Marshall being from home and not knowing what his feelings might be I would not stop at Glengallan."

Englishman C.H. Marshall, uncle of Cambridge economist Alfred Marshall, was born in Mauritus in 1821. His family background was in London and Devon. Marshall's name first appears at Ellangowan in 1848. A young man from a respectable, but financially modest background, he is said to have made his Australian fortune on the goldfields by astute business dealings. He was an active member of the Church of England and Secretary of the Warwick Church committee. In 1858 Marshall gave 11 acres of land in (Glennie Heights) Warwick for a parsonage and Glebe, "Hillside", which still stands.

Charles Marshall married Charlotte Drake and, in 1865, returned to England. The fourth of their six children, Bertram, was born in 1870 at "The Cedars" Caversham, in Oxfordshire. Due to the financial difficulties of his partner Deuchar, Marshall had to return to Australia. In 1873 he took W.B. Slade into partnership and again retired to England where he died in August 1874. Slade's partnership with the Marshall estate continued until 1904 when Glengallan was cut-up for closer settlement.