Castlereagh River
The Castlereagh rises 20 km west of Coonabarabran in the heart of the Warrumbungle mountains at an elevation of about 850 metres. From its commencement upstream in the mountains the river initially flows east through the town of Coonabarabran. It then arcs round south and southwesterly to the village of Ulamambri, then south to Binnaway, and SSW to the small town of Mendooran which lies at the eastern side of the river's hook-shape. From here the Castlereagh flows in a westerly direction at the flattened bottom of the hook and then turns north-westerly towards the town of Gilgandra. From Gilgandra it continues to run northwesterly across the plains through Gulargambone and Coonamble, then continuing across expansive plains, with no urban centres, where elevations are less than 200m, until it joins the Macquarie River at its uppermost reaches beyond the Macquarie Marshes. Its confluence with the Macquarie is about 65 km SW of Walgett. Not far from the Castlereagh/Macquarie confluence the Macquarie itself joins the Barwon River at a place about halfway between Walgett and Brewarrina.
Lord Castlereagh (1802 EIC ship)
EIC voyage #4 (1811–1813): Captain Kymer sailed from Torbay on 30 May 1811, bound for Bengal and China. "Lord Castlereagh" reached Madeira on 21 June and arrived at Kedgeree on 18 November. She was at Saugor on 5 December, Penang on 4 May, and Malacca on 9 June. She arrived at Whampoa anchorage on 29 June. Homeward bound, she crossed the Second Bar on 27 August, returned to Malacca on 18 October, and reached Saugor on 5 December. She stopped at Acheh on 26 April 1813, reached St Helena on 10 August, and arrived at The Downs on 7 November.