"Having remained out three days, we returned to our quarters at Rose Hill with the pleasing intelligence of our discovery. The country we had passed through we found tolerably plain, and little encumbered with underwood, except near the riverside. It is entirely covered with the same sort of trees as grow near Sydney; and in some places grass springs up luxuriantly; other places are quite bare of it. The soil is various; in many places a stiff, arid clay, covered with small pebbles; in other places, of a soft, loamy nature; but invariably in every part near the river it is a coarse, sterile sand. Our observations on it (particularly mine, from carrying the compass with which we steered) were not so numerous as might have been wished. But, certainly, if the qualities of it be such as to deserve future cultivation, no impediment of surface but that of cutting down and burning the trees exists to prevent its being tilled. "To this river the Governor gave the name of Nepean (after Captain Nepean, of the New South Wales corps). The distance of the part of the river which was first hit upon from the sea coast is about thirty-nine miles, in a direct line, almost due west." In December, 1789, Governor Phillip dispatched a party, under Lieutenant Dawes, of the Marines, accompanied by Lieutenant Johnson and Mr. Lowes, to cross the Nepean and try to penetrate the range beyond. They discovered a ford in the river, and crossing, proceeded in a westerly direction. So rugged and difficult, however, did they find the country that in three days they had only covered fifteen miles. At a bill that they called Mount Twiss they turned back, having penetrated fifty-four miles in a direct line from the sea coast. In August, 1790, Messrs. Tench, Dawes, and Morgan explored south and west of Rose Hill. They struck the Nepean higher up, nearer its source than on the former occasion, and remained out seven days, penetrating to a considerable distance in a south-west direction. Near the end of the same month, the same party made an excursion to the north-west of Rose Hill, and traced the Nepean to where it was first discovered by Tench's party in 1789. In April, 1791, Governor Phillip, attended by a large company, numbering in all twenty-one persons, including two natives, set out on an expedition from Rose Hill to determine the identity, or not, of the Nepean and the Hawkesbury. On the 12th of the month they struck the river, and followed it down for some distance, but did not accomplish the object they had in view. In the following month, however, Messrs. Tench, Dawes, and two soldiers, again went out, and settled the vexed question.