 He was discovered selling guns illegally to some of the Indians and had to flee the territory, this time settling in Independence, Missouri, where he became a merchant.He visited his son once more, then his business failed and in 1836 he emigrated, in the employ of the American Fur Company to Santa Fe, New Mexico and thence to Southern California via the Santa Fe Trail.In southern California, Marsh claimed he was the only person who had any knowledge of western medicine.