Morley was to devote the most of the next two decades working in the Maya region, overseeing the seasonal archaeological digs and restoration projects, returning to the United States in the off-season to give a series of lectures on his finds. Although primarily involved with the work at Chichen Itza, Morley also took on responsibilities which extended Carnegie-sponsored fieldwork to other Maya sites, such as Yaxchilan, Coba, Copán, Quiriguá, Uxmal, Naranjo, Seibal and Uaxactun. Morley rediscovered the last of these sites (located in the Petén Basin region of Guatemala, to the north of Tikal). Believing that there must be many more as-yet unknown ancient Maya sites in the area, Morley advertised a "bounty" in return for news of such sites to the local "chicleros", who ranged through the jungles seeking exploitable sources of natural gum; in due course he was rewarded with the information which led to its rediscovery. He also bestowed its name, "uaxactun", from the Mayan languages, after a stela inscription he found there which recorded a Maya Long Count Calendar date in the 8th cycle (i.e., "8-"tuns""; the name could also literally mean "eight stones").