The Wienholt family were a pioneering family in the Darling Downs and Fassifern areas. They owned numerous pastoral stations, including Jondaryan station. Much of this collection relates to Arnold Wienholt Jnr who was a pastoralist, Queensland Legislative Assembly member, House of Representatives member, big-game hunter in Africa, and scout in Africa during World War I.

This family firm is synonymous with the early days of Brisbane. The founder, Andrew Petrie (1798 - 1872) arrived in Moreton Bay in 1837 to take up the position of Superintendent of Works. In 1842 he began his own building company, with monumental masonry and undertaking as a sideline. Under the tenure of his son, John (1822 - 1892), the building business collapsed and the family continued in the monumental masonry business. Andrew Lang Petrie (1854 - 1928), in partnership with his son John George (1879 - 1934), operated in a small way from an office and workshop at the Cemetery Gates, Toowong. The Petrie business has always passed to the first son. At different times, there have been branch offices in Warwick, Bundaberg and Townsville. Some examples of the firm's work, apart from headstones, are the Column-and-ball memorial at Graceville (1920) and the Fluted Obelisk placed at Memorial Park, Toowong (1922).

The Briggs family lived at Clunes, Victoria. Charles Henry Briggs’ mother, Eliza Briggs (nee Rowley) was the daughter of Captain Thomas Rowley. Charles Henry Briggs moved to Sydney and later set up in business at Bathurst and Goulburn. Ernest Briggs, a 5th generation Australian, was descended from Captain T. Rowley and was manager of the Radio Station 4BK in Brisbane in the 1930s. The papers relating to the Briggs family consist mainly of correspondence, which belonged to Charles Henry Briggs and one of his sons Charles James Briggs, and a number of miscellaneous documents such as a tombstone inscription of the Briggs and Rowley families and papers relating to the Australian Natives Association. The newspaper clippings in a bound volume are from the Brisbane Courier, the Telegraph and the Chronicle from December 1894 to April 1895 regarding the case against Rev. Charles Ogg brought by the Presbytery of the Ann St Church. There is also a illuminated parchment testimonial, which was given to Miss Margaret Ann Ogg, daughter of Rev. C. Ogg, on her retirement. Most of the studio portrait photographs are from an album of the Briggs family, some with identification. Others are photographs of Ernest Briggs and the staff of the station 4BK in the 1930s, and there is also one of Miss Margaret Ann Ogg at her house in Windsor. The collection was collected and presented by W.B. Ross (1857 to 1930).