Foundation investigations for the proposed Commonwealth Law Courts Building were requested in a letter dated 3rd November, 1967 from the Acting Director of Works. The proposed building will be about 130 feet long and 100 feet wide. No other details are available but it is understood that it will be multistorey. Footing types under consideration include bored piers and a shallow raft structure. The investigation consisted of four cable tool drill holes, each about 60 feet deep at the corners of the proposed building. The holes were tube sampled throughout, with sealed tube samples taken in Hole C.H.3 at intervals of about 5 feet. The holes were extended to 92 feet, 70.5 feet, 70 feet and 64 feet respectively by diamond drilling. Levels shown on the logs are based on contours shown on the city of Adelaide 4 chains to 1 inch plan, and are accurate only to the nearest foot. This report discusses the results of the drilling and also includes relevant information gained from drill holes and excavations elsewhere in the city area.