 The Stirlings opted for the earlier date, to the consternation of many in the archaeological community.They were proven correct in 1970, when the top half of Stela C was discovered, and the earlier date of 7.16.6.16.18, or 32 BCE, was confirmed.He also led the first of several expeditions to San Lorenzo Tenochtitlán (1938), La Venta (1939–40) and Cerro de las Mesas (1940–41).