Research material on Bourn, Great Gransden and Great Chishill post mills
Schema of Great Gransden post mill's trestle
Schema of Great Gransden post mill's lag-governor
Schema of Great Gransden post mill's lag-governor
Schema of Great Gransden post mill's lag-governor controlled tentering
Schema of Bourn post mill's trestle
Schema of Great Chishill, Bourn and Great Gransden post mills
Schema of Great Gransden post mill's trestle
Hollow post drainage mill, Friday Bridge
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
"Over, Cambs"
Tower mill, Over - gearing
"Over, Cambs"