English: Bolton's Pit Bolton's Pit on the south side of Barton Road was first quarried for clay for local brickworks, approached from Grantchester Road during late Victorian era and then during 1900s coprolites were extracted for fertilizers and explosives until it was used as a rubbish tip during and after WW1 when it then filled with water from Binn Brook and became naturalised. Many of the houses around were built in the 1920s and 1930s by local Walter Boyton using the typical Cambridge yellowish brick.