who were with them on their expedition." William Clark's letters to his brother In 1988, 47 letters written by Clark to his brother Jonathan were discovered; written between 1792 and 1811, they were published as a volume in 2002. Information concerning York was one of the main surprises in the letters, according to their editor James J. Holmberg. From them we learn the previously unknown fact that York had a wife, and that his marriage antedated the expedition, which was deliberately made up primarily of unmarried men, like Lewis and Clark themselves. All that is known of his wife is that she was from the Louisville area, where Clark and York lived before the expedition, and that she was owned by someone else. York's attempts to persuade Clark to let him return to the Louisville area led to a serious falling-out between them in 1808. That year Clark moved to St. Louis, to take up his new duties as US agent for Indian affairs. York and other household members moved with him. By November 1808, Clark was angered by York's refusal to accept the move to St. Louis and repeated requests that he be hired out in Louisville or sold to someone there. As Clark wrote his brother when finally giving in, he decided to York was sent to work for a strict Louisville nephew, John H. Clark. A few weeks later, Clark mentions York again to his brother: Clark believed that York would not provide "service" in St. Louis, and this angered him. He wrote his brother again that he would have punished York, and that if he is hired out in Kentucky, it should be with a "Severe Master" so that after "a while he may do Some Service, I do not wish him again in this Country until he applies himself to Come and give over that wife of his—I wished him to Stay with his family four or five weeks only, and not 4 or 5 months." York was forced to return to St. Louis, where Clark found him "insolent and sulky". To "mend" this Clark whipped York ("gave him a Severe trouncing"). He put him in jail ("Caleboos", slang Spanish ) in July 1809. By August Clark had decided "to hire or Sell him". This is the last mention of York in the letters written by William Clark. A 1811 letter from a Louisville relative