Scope and Contents Often called "the Historian of the Santa Fe Trade," Josiah Gregg (1806-1850) was an early trader, and the author of 'Commerce of the Prairies,' published in 1844; These papers consist of sixteen letters to his brother John concerning business and trade and also tell something of his work as a doctor. There are several "memorandum books." One notebook contains notes made while he was in medical school at Louisville, Kentucky. A note on the front of the book indicates it would be "what we now...