Beginning in the 1950s archaeologists such as Grahame Clark (1954) at Star Carr in England began the systematic recovery of faunal and plant remains in order to reconstruct prehistoric subsistence. Clark (1952) himself had sought material for analogy in European folk practices, and, both then and now, archaeologists have turned for assistance to a rich ethnographic, experimental, ethnobotanical, and historical literature. Merely to give an indication of the range of such sources, and limiting ourselves to North America, we might cite Wilson's (1917) Agriculture of the Hidatsa Indians, Wright's (1993) simulated use of experimental maize grinding tools, Nabhan's (1985) Gathering the desert, and Crader's (1984) use of historical sources in her study of the zooarchaeology of Thomas Jefferson's residence at Monticello. So rich and varied indeed is the literature that, when ethnoarchaeologists have undertaken studies of subsistence, they have done so with very particular archaeological questions in mind.