Returning to the mainland, Grace rejoined her husband and resumed work supplying sentimental Pomo portraits to eager buyers as well as accompanying John on much of his field work. In 1902, she painted a portrait of a Pawnee boy; John Hudson had been working to document the Pawnee on assignment for the Field Columbian Museum. In 1904, Grace Hudson accepted a commission from the Field Columbian Museum to take up residence in the Oklahoma Territory and paint further images of the remaining Pawnee, a people who had been nearly wiped out by contact with European diseases. There she preserved primarily chiefs and elders on canvas and photographic negative. Some of the Hudson's collected artifacts and Grace's paintings were destroyed in San Francisco's calamitous fire following the 1906 earthquake while they were in Oklahoma.