Norwalk was purchased in two separate transactions in 1640 and 1641 by Daniel Patrick and Roger Ludlow. Patrick purchased areas west of the Norwalk River and east of the Five Mile River (present day South Norwalk, Rowayton, and West Norwalk) on April 20, 1640. Ludlow purchased areas east of the Norwalk river (present day East Norwalk and Saugatuck) on February 26, 1641, according to the Gregorian calendar; or February 26, 1640, on the then still commonly used Julian calendar. The later purchase by Ludlow is misleadingly depicted in Norwalk founding memorabilia (such as the WPA painting shown) as having occurred in the year 1640.