The Hyde Parks Barracks website has recently been rediscovered, and has been suggested as a ‘blast from the past’ for the blog. The website includes various images of excavations from the 1980’s, which you can check out here: https://sydneylivingmuseums.com.au/stories/archaeology-action-hyde-park-barracks
An excerpt from the page states:
In 1979 a major restoration of Hyde Park Barracks was begun, and by September 1980 the Barracks became the subject of the first publicly-funded archaeological excavation in New South Wales. Test trenches were opened by archaeologist Wendy Thorp, and then for 14 weeks throughout 1981 the site was under excavation by a team of 11 archaeologists, a conservator, a photographer and 250 volunteers, led by archaeologist Patricia Burritt.
…
During these excavations archaeologists discovered over 120,000 artefacts around the site, including over 80,000 recovered from beneath the floors of the upper levels of the dormitory building, where objects had been trapped for up to 160 years. An estimated 80 per cent were left behind by women of the Female Immigration Depot, the Hyde Park Asylum for aged and destitute women and courts and government offices, and the remaining 20 per cent survived the installation of new ceilings in 1848, and date from the convict period.