the ground in places, for example by the bridges under Christ Church Mount (a crescent road off Manor Green Road). Shortly afterwards, it flows underground again and this is where it runs under Epsom Primary School on Hook Road at the junction with Longmead Road. This is where the stream comes above the ground. It runs parallel with Longmead Road where it runs near to Longmead Industrial Estate and Blenheim High School until the road meets the B2200 (Chessington Road) and the stream runs under it. This is where it flows between the two roads named Green Lanes (the river is named after the roads). It runs into the Hogsmill Open Space before meeting the confluence with Hogsmill Stream. Ewell Court Stream Ewell Court Stream is 1.7 miles (2.7 km) long and starts near a pond on the edge of Nonsuch Park by the A24 (London Road) in Stoneleigh. After running under the A24, it continues under Briarwood Road. It is visible again briefly in an alley near Stoneleigh railway station. The stream bends left under Stoneleigh Park Road and runs under Walsingham Gardens and the A240 (Kingston Road) where it enters Ewell Court. After running after Preston Drive, it enters Ewell Court Park and comes above ground before running through Ewell Court Lake. As it continues through the park towards the meeting point with the Hogsmill it passes the Packhorse Bridge, which was named after the mules that regularly transported gunpowder from the mills, across the river and into a brick magazine. At its height in the mid-19th century, the gunpowder mill complex by the bridge employed 156 men. Gunpowder from Ewell is said to have been used in the American Civil War. Bonesgate Stream The Bonesgate Stream is the principal stream of the Hogsmill River. It is 3 miles (5 km) in length and rises in Malden Rushett near the crossroads of the A243 and B280. It flows in a NE direction through farmlands before flowing just east of Chessington. After crossing under Filby Road, it heads past the Bonesgate pub, now called the William Bourne, in Moor Lane on the eastern edge of Chessington. The bridge over the stream is where Moor Lane and Chessington Road meet. The river then heads through open space, flowing under a bridge near Cox Lane Community Centre. The river goes past the edge of the Cox Lane Estate shortly before joining