Facsimile of 1884 edition. Ferguson 10075 Includes Messrs. Gregorys’ Expedition to the East and North of Swan River, 1846 pp.210 Plates #150216

In 1846, with his two brothers, F. T. Gregory and H. C. Gregory, Augustus Charles Gregory made his first exploration. With four horses and seven weeks’ provisions they left T. N. Yule’s station 60 miles northeast of Perth on 7 August 1846 and explored a considerable amount of the country to the north of Perth, returning after an absence of 47 days during which they had covered 953 miles (1534 km).

Two years later, Gregory lead an expedition to examine the course of the Gascoyne River and, in particular, to look for new pasture-land. The party left on 2 September 1848, crossing the Murchison River 25 September, but the country was very dry and it became difficult to water the horses. Gregory decided to turn south again in the beginning of October, and on 6 October decided to rest the horses by the Murchison River. The party returned to Perth on 12 November after having found good pastures successfully. Despite water supply difficulties, about 1500 miles (2414 km) were covered in a period of 10 weeks.

In 1854 while Assistant Surveyor of Western Australia, Gregory was asked to lead an expedition to the interior, from a rendezvous point at Moreton Bay near Brisbane. Gregory had his brother, H. C. Gregory, as second in command and Baron von Mueller as botanist. There were 19 men altogether, with 50 horses and 200 sheep. The party left Moreton Bay by sea on 12 August 1855, and Port Essington was sighted on 1 September. On the next day their vessel grounded on a reef and it was impossible to float off until 10 September. They proceeded to Pearce Point (Joseph Bonaparte Gulf), and at the end of the month the party reached the estuary of the Victoria River. The party split up, with one group going up the river in a schooner, while Gregory led the other over the range. They were reunited on 20 October, establishing a camp 20 km west of today’s Timber Creek. Gregory led several forays up the Victoria River and traced Sturt’s Creek for 300 miles (483 km) until it disappeared in the Tanami Desert. The core team returned to the base camp in the dry season of 1856. On 2 July 1856 Gregory left an inscription on a large boab tree (so-called Gregory’s Tree), indicating where he left a letter in case the expedition team should get lost. Turning east, the party explored the Elsey, Roper and Macarthur Rivers, then travelled back to Brisbane by way of the Flinders, Burdekin, Fitzroy and Burnett Rivers. They reached Brisbane on 16 December 1856 having surveyed an extensive swath of land. In sixteen months the expedition had journeyed over 2000 miles (3219 km) by sea and 5000 (8047 km) by land.

In September 1857 Gregory was hired by the government of New South Wales to search for traces of Ludwig Leichhardt, a fellow explorer who had disappeared on an earlier expedition. A party of nine was formed with Gregory in command and his brother, C. F. Gregory, as second in command. On 24 March 1858 the expedition left Juandah near the present town of Taroom. On 21 April a tree marked with an L was found in latitude 24 degrees 35 minutes and longitude 146 degrees 6 minutes. The Barcoo River was then followed to its junction with the Thomson. On 15 May the country was so dry the expedition turned south to save the horses. Cooper Creek was followed until it was close to the South Australian border, coming to Strzelecki Creek on 14 June. Continuing his course mostly to the south, on 26 June he decided to proceed to Adelaide, which was reached at the end of July 1858.