After the lapse of one month McCoy made his appearance and, most opportunely, brought an extra supply of animals. The camp was soon struck and the whole band started for the rendezvous, which had been appointed to convene at the mouth of Horse Creek on the Green River. They reached this place after several days of hard travel. As usual, trading operations did not commence until all the regular bands of trappers had arrived and reported. They were then commenced and continued through a period of twenty days. Here Kit Carson left the company under McCoy and joined a company under the management of a Mr. Fontenelle which numbered one hundred men. This party went to and trapped on the Yellow Stone River. On commencing operations the party was divided into fifty trappers and fifty keepers. The duties of the former were to take the beaver and provide game for food. The latter to guard their property and cook. The trappers were now in the midst of their sworn foes, the Blackfeet Indians. They felt themselves sufficiently strong and were desirous to pay off old scores. They therefore trapped where they pleased, being determined to dispute the right of possession to the country if attacked. They were not, however, molested. A good reason appeared for this, soon after, brought by some friendly Indians belonging to the Crow Tribe. They informed the whites that the small pox was making terrible havoc with the Blackfeet Indians. Thousands were dying and fears were entertained that the whole tribe would be cut off. In order to attend to their sick they had secluded themselves. The trapping season being nearly over, as the streams began to freeze, the party commenced looking out for a camping site.