Pictographs of the North American Indians. A preliminary paper / Fourth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1882-83, Government Printing Office, Washington, 1886, pages 3-256 - Garrick Mallery

1810-’11.—No. I. Red-Shirt, a Dakota, was killed by the Crows while looking for his ponies near Old Woman’s Fork.

No. II. They brought in a fine horse with feathers tied to his tail.

White-Cow-Killer calls it “Came-with-medicine-on-horse’s-tail winter.”