1771 to at least 1801, possibly until 1812. A corn mill was built in 1845 and was working until 1942. Bourne Mill, Southborough This mill is marked by Bournemill Farm. It is thought to have been a furnace. Priory Mill, Tonbridge This mill belonged to Tonbridge Priory. In 1865, the miller was Thomas Seabrook Jr. The mill was disused in the 1930s but nothing remains now to show where the mill stood. It had an overshot waterwheel. Tudeley Brook A stream rises at Colts Hill, Brenchley and enters the Medway from the right bank downstream of the Southborough Bourne. It powered two watermills. Keyes Mill, Pembury This watermill had a wooden overshot waterwheel. It was standing c. 1796, when it was painted by J M W Turner and was working until at least 1885. Badsell Mill, Paddock Wood This mill site is to the north-west of the crossroads between the B2017 and A228. Tributary of the Tudeley Brook Spring Grove Mill, Pembury This mill stood in Redwings Lane. In the thirteenth century it was given by Simon de Wahull to Bayham Abbey. Pen Stream The Pen Stream rises to the west of Dene Park in Tonbridge, entering the Medway from the left at Hadlow Stair. It powered a watermill. Mill at Hadlow Stair This watermill may have been in existence in 1460, when a survey of Hadlow was carried out. The Mill House was in existence then, in the occupation of Richard Bishop, and the Mill Ditch was mentioned. River Bourne The River Bourne enters the Medway from the left at East Peckham. The River Bourne was used to power a number of watermills in its length. In order from source these were: Old Mill, Borough Green (corn?); Basted Mill (Platt parish) (paper); Lower Basted Mill, Plaxtol (corn?); Winfield Mill, (corn); Longmill (corn); Roughway Paper Mill; Hamptons Paper Mill (West Peckham parish); Oxonhoath Mill (corn); Bourne Mill (corn), Hadlow; Goldhill Mill (corn), Golden Green; Pierce Mill (corn); and finally Little Mill (corn), East Peckham. Old Mill, Borough Green Little is known of it except that the millpond was about long and wide at the mill, giving an area of up to . The head was about . Basted Paper Mill, Platt This paper mill was marked on Hasted's map and known to be in operation in 1716. It may be the paper mill at Wrotham which William Quelch was working