PRN 37054 George and Nathaniel Hempstead's Iron Works (see PRN 37053) were later renamed 'Grantham Crank and Iron Co.' and in 1905 'Grantham Boiler and Crank Co.'. Under these names, for nearly another century they turned out a mass of engineering products ranging from boilers and crankshaft forgings to bridges. One of their final products before they closed down in the 1970s was the structure of the Cambridge 'Cyclotron' which was involved in much of the earlier work on nuclear physics. Following their closure the works became a steel stockholders and then went into semi-deriliction.{1}