Here are some more bread oven references: Fred Kniffen 1960 The Outdoor Oven in Louisiana. Louisiana History 1(1):25-35; Figs. 4-12. Julia Costello 1981 Gold Rush Archaeology: Excavating in the Mother Lode. Archaeology 24(2):18-26. Roberta Greenwood and Laurence Shoup 1983 New Melones Archeological Project, California: Review and Syntheseis of Resrch at Historical Sites. Final Report of the New Melones Archeological Project, Vol. VII. INFOTEC. Report submitted to National Park Service, Washington, D.C. The Anthropological Studies Center at Sonoma State University in northern California excavated one at a Basque cattle ranching site built in the 1850s. Results are documented in: Grace Ziesing 1997 Archaeological Investigations of the Vasco Adobe Site, CA-CCO-470H, for the Los Vaqueros Project... ASC, SSUAF. If you can't find any of these publications, feel free to contact me off-list and I can probably arrange to get you copies. --Grace Ziesing [log in to unmask]