A stream rises near Jarvis Brook, and enters the Medway on its right bank below the Warren Brook. It powered three watermills, and a number of tributaries also powered watermills. Cowford Furnace TQ 559 320 This furnace was built in 1562, when the builders were in dispute with Lord Abergavenny. It appears to have ceased working by 1574. The dam is recorded as long and up to high. Redgate Mill, Rotherfield TQ 552 324 Redgate Mill was a corn mill, on the site of an earlier furnace. Birchden Forge, Rotherfield TQ 533 353 Birchden Forge had a large pond, fed by two streams. It was mentioned in the will of Roger Machyn, proved in 1524. In 1574 it was sold to Sir Walter Waller, passing to Michael Weston in 1579. In 1595 the Earl of Dorset bought the forge, his tenant being Thomas Richardson. It was recorded on a map of 1598. The forge was sold to John Baker in 1617, with tenant Richard Maynard, who left his half share in Birchden and Hamsell furnaces to his son-in-law in 1619. The forge was operating in 1653 and 1667. John Browne built a boring mill in 1677. The forge was mentioned if reference to the sale of two iron mills at Birchden in 1709 and 1719. The forge remained in the Baker family until 1737. The dam has been recorded at long and high. The Jarvis Brook A stream rises near Rotherfield, entering the Waterdown Forest Stream on the left bank just below Redgate Mill, it powered a furnace. Maynards Gate Forge TQ 540 298 This forge shared the same pond as the Furnace. The dam has been recorded as long and high. Maynards Gate Furnace TQ 539 298 An iron furnace, possibly also known as Knights Place. This furnace was probably in operation in 1562. Anthony Fowle being the operator. In 1574 it was owned by Lord Buckhurst and operated by Arthur Middleton. in 1674 Anthony Fowle of Newick left the furnace to his son Richard. It was working in 1653 but ruined by 1664. Eridge Stream A stream rises in Eridge, it flows into the Waterdown Forest stream on the right bank below Redgate Mill. Eridge Furnace TQ 564 350 A large pond in Eridge Park marks the site of Eridge Furnace. It was owned by Lord Abergavenny in 1574, but may have been in existence in 1538. The