Mormon History, May 10, 1847. Monday.

[William Clayton Journal] The morning fine but cool. The wind nearly ceased. Last night I dreamed that I was in company with the camp which was stopping beside a considerable river of deep water. Our horses and cattle were tied to stakes all around the camp to the distance of a quarter of a mile, some good timber thinly scattered around. I thought President Young, Kimball and several others started up the river in a flat boat without stating their object, leaving the brethren to guard the camp, cattle &c. in their absence. When they had been gone sometime I thought a large herd of buffalo came on full gallop right amongst our horses and cattle, causing them to break their ropes and fly in every direction. The brethren seemed thunderstruck and did not know what to do. Seeing a small skiff in the river I sprang into it and a paddle lying in it I commenced rowing in pursuit of the President. It seemed as though I literally flew through the water passing everything on the way like a railway carriage. In a few minutes I overtook the brethren in the flat boat, took the skiff and threw it on shore and to my astonishment I saw that the skiff was made only of barks and cracked all over and it seemed impossible to put it in the water without sinking it. The paddle with which I had rowed proved to be a very large feather and I had another feather in my left hand with which I steered the skiff. When I got into the flat boat I made known what had passed in the camp but the brethren seemed in no ways alarmed. I awoke and behold it was all a dream. Dr. Richards is going to deposit a letter in a stick of wood prepared for the purpose near this place in such a manner that the next company will discover it. He fixed it on a long pole and being assisted by President Young and others raised it and fixed it firm in the ground . . .

[source: George D. Smith, An Intimate Chronicle; The Journals of William Clayton, Signature Books in association with Smith Research Associates, Salt Lake City, 1995, http://amzn.to/william-clayton]