During years of art training, an increasing fascination with cowboys and Native Americans led to four museum-sponsored anthropological expeditions to western Canada (1928-1932) and a book, Mœurs et histoire des Peaux-Rouges (1928, with Rene Thévenin), still in print as a standard work.

Coze moved to the United States circa 1938, in Pasadena, California since 1942, spending two years producing major educational murals at Mesa Verde National Park.

Coze created numerous paintings and drawings that were used as illustrations in Arizona Highways magazine; he often also wrote the article texts that were informed by his work as an anthropologist.

The article tracks the 24 hour long ceremonial dance that takes place during the winter solstice each year, blessing the new homes at Zuni pueblo.

[7][8] He published seven books and numerous articles for Arizona Highways magazine, was awarded the Chevalier de la Légion d'honneur in 1954, and was French consul for Phoenix for decades.

The Royal Alberta Museum in Edmonton holds 122 objects from Coze's personal collection including horse gear, model canoes, games, and garments.