The earliest documentation of Los Guachimontones comes from Victorian artist Adela Breton. Breton traveled through the Tequila Valleys region in the 1890s. During her travels, near the town of San Marcos Breton documented a mound in the process of being destroyed that contained several burials, hollow ceramic figures, and shell ornaments. This mound was likely the central altar for a guachimonton, but with its complete destruction, we may never know exactly what the mound was. Breton continued east stopping at the town of Teuchitlán in which she documented the site of Los Guachimontones. Breton took three photographs of the site, created two sketch maps, and collected a number of obsidian artifacts from a Postclassic workshop. These materials are now stored at the Bristol City Museum and Art Gallery in Bristol, United Kingdom. Unfortunately, Breton did not publish her maps or photographs and the unique architectural form of the guachimontones went unnoticed for several decades until the late 1960s.