This collection dates from 1973 to 2020 and includes documents, papers, drawings, sketches, notes, correspondence, photographs, slides, tapes, maquettes, newsletters and published works, amongst other item types. They largely relate to stone and bronze works but also relate to ceramic, fiberglass, steel, leather and wood work. They reflect works undertaken for numerous clients including the University of Queensland, the Queensland Government, Queensland private schools, hospitals, hotels, institutions and individuals. Clients also include governments and private institutions and individuals from outside of Queensland. While most of the items relate to works undertaken in Queensland, they also relate to works undertaken in other Australian states and territories and other countries including, the Australian Capital Territory, Tasmania and Hong Kong, amongst others. Includes an original drawing and signature from Harold Parker in a 'friendship book' from the Parker family, dated 1907 to 1910.

Life sized portrait bust of Vida Lahey in plaster, painted brown. Lahey is wearing a tied scarf. Not signed or dated. Vida Lahey visited Mayo at her Sydney Studio in George Street in late 1957 when sittings were made.

Portrait bust of Dame Mary Gilmore. Medium: cream plaster.

Portrait bust of female student's head. Medium: plaster, patinated. Inscribed on lower right side: D. Mayo / 1924? (last number unclear)

Scale model, or maquette, of Major General Sir William Glasgow in plaster. Glasgow is in the uniform of an officer of the Light Horse holding a pair of field glasses. The finished bronze statue is about 2.5 metres high. Sir William Glasgow Memorial was listed on the Queensland Heritage Register on 13 May 2004