From an article on Wind Wagons over at Kansapedia:
“The ship hove in sight about 8 o’clock in the morning with a fresh breeze from east, northeast. It was running down in a westerly direction for the fort, under full sail, across the green prairie. The guard, astonished at such a sight, reported the matter to the officer on duty, and we all turned out to view the phenomenon. Gallantly she sailed, and at a distance …not unlike a ship at sea. In front is a large coach lamp to travel by night when the wind is favorable … A crank and band wheels allow it to be propelled by hand when wind and tide are against them.”
See also, Land Sailing on Wikipedia