Erna Fergusson endeavor—Indian Detour Service. In 1931 Erna Fergusson published her first book "Dancing Gods", which was about Indian ceremonials. Several histories and numerous travel books followed after her success with "Dancing Gods".In her 1934 book, "Mexican Cookbook", Fergusson was perhaps the first to correct the English-speakers notion that "frijoles refritos" meant "refried beans", but the correction never reached the popular consciousness. In 1942 Erna Fergusson helped found the Albuquerque Historical Society. The year after she was awarded as an Honorary Doctorate of Letters from the University of New Mexico. She died in Albuquerque in 1964. Erna Fergusson can be best depicted
Mexican Spanish in Texas after its independence from Mexico, and their descendants continue to speak a variety of Spanish known as "Tex-Mex". And after the Treaty of Guadalupe Hidalgo many Mexicans remained in the territory ceded to the U.S., and their descendants have continued to speak Spanish within their communities in Arizona, California, Colorado, New Mexico, Nevada, Utah, and Wyoming. In addition, the waves of 19th- and 20th-century migration from Mexico to the United States (mostly to the formerly Mexican area of the Southwest) have contributed greatly to making Mexican Spanish the most widely spoken variety of Spanish in the United States.