In 1842, Deere entered a business partnership with Leonard Andrus and purchased land for the construction of a new, two-story factory along the Rock River in Illinois. This factory, named the "L. Andrus Plough Manufacturer", produced about 100 plows in 1842 and around 400 plows during the next year. Deere's partnership with Andrus ended in 1848, and Deere relocated to Moline, Illinois, to have access to the railroad and the Mississippi River. There, Deere formed a partnership with Robert Tate and John Gould and built a factory the same year. Production rose quickly, and by 1849, the Deere, Tate & Gould Company was producing over 200 plows a month. A two-story addition to the plant was built, allowing further production.