 After Chalgrove, the Brook flows through Stadhampton and then Chiselhampton where it joins the River Thame, a tributary of the River Thames.Flooding used to be a problem, with 22 houses seriously flooded in 1879.In the 19th century a sluice was built at the eastern end of the village and from the original Chalgrove Stream, now called the Back Brook, some of the water was diverted to run alongside the current High Street.