The collection contains tracings, drawings, blueprints and linen plans for residential and commercial buildings in Brisbane and regional Queensland. Also includes work of Alexander I Trewern, younger brother of E P Trewern. Includes 38 photographs (20 x 26 cm or smaller), nine oversize photographs (most on paper mounted on board) of buildings by Trewern, including his own house; specifictions for St. Matthew's Anglican Church and the Upper Mt. Gravatt Methodist Church; three envolvopes from the American Face Brick Association with plates for houses; publications relating to houses by G. L. Sutcliffe; and journal cuttings.