The course of the Lachlan being nearly due west, it was selected as the most likely river of the two to lead immediately to the navigable waters of the interior, which everybody now firmly believed in; but a delay of nearly two years occurred before an expedition was formed to carry into effect the purpose of following it down with boats. Meantime, the settlers took every advantage of this new outlet for their energies. Cattle and sheep were pushed out, and some of the land put under tillage. Buildings rapidly sprang up, and, favoured by a beautiful site, the township of Bathurst soon presented an orderly appearance. Private enterprise had also been at work elsewhere, and the early pioneer graziers were now making south from the settlement towards the Shoalhaven River and the intermediate country. It was down here that young Hamilton Hume, the first native-born explorer to take the field, was then gaining his bushcraft. Hume was a son of the Rev. Andrew Hume, who held an appointment in the Commissariat Department, and came to the colony in the LADY JULIAN. The future explorer was born at Parramatta in 1797, so that he was but seventeen when, in 1814, he made his maiden effort in the country around Berrima, in company with his brother and a black boy; and-in the year following he again made an excursion in this district. In 1816 his father conducted Dr. Throsby to new country that the energy of his sons had discovered; and in March, 1817, at the time when Oxley was about starting on his Lachlan expedition, Hume, at the request of Governor Macquarie, went with Mr. Surveyor Meehan and Mr. Throsby on an expedition as far as the Shoalhaven River. Here, in consequence of some dispute with Mr. Meehan, Mr. Throsby left the party, and, accompanied by a black boy, made his way to Port Jarvis. Meehan and Hume continued their journey, and discovered Lake George, Lake Bathurst, and the country called Goulburn Plains. But the trip undertaken by Mr. Oxley at this time, leading as it did to such unexpected results, claims our first attention. As the party were to take boats with them, boat builders were sent up to Bathurst, thence to proceed to the river and build the necessary craft. A depôt having been formed on the Lachlan River, on the 6th of April, 1817, Mr. Oxley left Sydney to join his party there, and arrived at this depôt on the 25th of the same month, having been detained a short time at Bathurst. On the 1st of May, Mr. Oxley reached the limit of Mr. Evans' journey in 1815, a small creek which they christened Byrne Creek; from here the work of exploration commenced. The following is a list of the men comprising, this, the first most important expedition in the annals of exploration:--