Crowmarsh Gifford Norman. A north transept with a pointed arch was added in about 1200. The building was restored in 1836 and 1868. In 1139 King Stephen built a wooden fort in Crowmarsh, the first of a series built in opposition to Wallingford Castle, which supported his cousin Matilda during the civil war known as The Anarchy. The forts were probably dismantled as a result of the Treaty of Wallingford of 1153. The castle at Crowmarsh consisted of a wide ditch surrounding an enclosure measuring . In 1701 agriculturist Jethro Tull invented his revolutionary seed drill here. In 1770 nearby Mongewell Park
Drill hub that are turned to move the spindle and chuck vertically. A drill press is typically measured by its "swing", calculated as twice the distance from the center of the chuck to the closest edge of the column. Thus, a tool with 4" between chuck center and column edge is described as an 8" drill press. A drill press has a number of advantages over a hand-held drill: For most drill presses—especially those meant for woodworking or home use—speed change is achieved by manually moving a belt across a stepped pulley arrangement. Some drill presses add a third stepped pulley