A fair number of explorers and missionaries left brief ethnographic notes concerning the Guaycura. The most detained accounts were written by the Alsatian Jesuit Johann Jakob Baegert, stationed at San Luis Gonzaga mission between 1751 and 1768 (Baegert 1772, 1952, 1982). Baegert took a decidedly sour view of his charges, at one point characterizing them as "stupid, awkward, rude, unclean, insolent, ungrateful, mendacious, thievish, abominably lazy, great talkers to their end, and naïve and childish." His views as to the extreme simplicity of Guaycura social organization and belief systems have often been accepted as factual, but they may owe something to the missionary's own acerbic personality. He was scarcely kinder to European critics of the Jesuits. As one scholar said, "Products of their own self-righteousness and conceit, the Jesuits learned little...about the Indians."