Locally farmed wheat was milled at Aldermaston Mill until the 1920s. In existence at the time of the Domesday survey, the mill was previously called the "Kingsmill", and at one time supplied flour to Huntley & Palmers in Reading. Now known as The Old Mill, it was owned by Wasing's Mount family throughout the 18th and 19th centuries. William Mount let the mill to Francis Webb (1797–1811), Mr Sherwood (1811–1820), Mr King (1820–1824), Mr Waldren (1824–1828), Mr Mathews (1828–1848), and William Gilchrist (1848–1856). Gilchrist (Mathews' business partner) bought the mill from Mount in 1856 using money inherited from his brother's death the previous year. Owning it outright for approximately a year, he drowned in the River Kennet in 1857 after visiting the Angel public house in Woolhampton. Joseph Crockett purchased the mill in an auction the same year, before it was acquired by a Richard Sisling of Godalming in 1858. In approximately 1860, the mill was purchased by the Kersley family. Between then and 1885, it was operated by Anthony Kersley, a miller and maltster who employed "six men and a boy, a carter, several domestic servants and a governess". Kersley's son, also named Anthony, ran the mill until 1895. That year, Walter Parson bought the mill and operated it until approximately 1897. Charles Keyser subsequently oversaw restoration on the mill building which "had been untenanted for upwards of three years". He let the mill out to a Mr Iremonger from 1901. Iremonger used the mill until the late 1920s, shortly before Keyser's death. After Keyser had died and the Aldermaston estate had been divided and sold, his widow, Mary, approached Evelyn Arlott to run the mill as a tea room and guesthouse. The Arlott family purchased the mill in approximately 1939, after the death of Mary Keyser.