Henry Spalding left Liberty on Wednesday, April 27, with two supply wagons and the animals headed for the Oto Agency Mission on the north bank of the Platte River. Marcus had arranged for the Satterlees, Allis’, Eliza, Narcissa and himself to be taken the 300 miles to the Oto Agency on the American Fur Company’s boat, Diana. They were to be picked up on Sunday, May 1. On Saturday, April 30 Martha Satterlee died. She had been sick since she and her husband had left Ithaca prior to joining the Whitmans in Williamsport, PA. The Satterlees and Allis’ were to travel with the party only as far as the Pawnee Indian mission.