Many houses had their own rotary querns for grinding flour. In olden days, grain was ground on manually operated rotary querns. Eventually, Glynn does hire a black man named Martin Querns. Other evidence of neolithic occupation included pottery, flints, axes, querns and charred grain. Querns and mortars are types of these crushing devices. They used either saddle stones or rotary querns turned by hand. Very few sickle blades and querns were found. Devlin's office quickly pressures Glynn to fire McManus, replacing him with Martin Querns. New warden Martin Querns and Sister Pete conclude that Schillinger's death was an accident. As a result, Unit Manager Martin Querns is fired and McManus is rehired. Querns of this calcareous sandstone have been found at Viroconium. There were also querns, hammerstones, and a few ground-stone axes made of greenstone. However, Said gives the tape to the warden and Querns is immediately fired. In the meantime, Martin Querns is named as his replacement as warden. Querns utilizing crank-and-connecting rods were used in the Western Han Dynasty.