A clay pipe linked to the U.S.-Dakota War of 1862 and a Sioux Chief who was hanged in Mankato, which is considered sacred by Native Americans in Minnesota, is being returned to the Sioux people after being sold at auction.

Skinner Auctioneers photo of pipe that was a peace offering for a soldier from Sioux Chief White Dog, one of 38 Sioux hanged in Mankato in 1862.

The Lower Sioux Indian Community unsuccessfully tried to stop the sale, and the pipe was sold by Skinner Auctioneers in Boston on Saturday for $40,000 — nearly twice its estimated value.

The buyer is remaining anonymous, but Prairie Island Tribal Council President Shelley Buck said the buyer wished to return the relic, and that’s being arranged.

The U.S.-Dakota War lasted six weeks and left hundreds of Sioux, settlers and soldiers dead. The pipe was a peace offering for a soldier from Sioux Chief White Dog, one of 38 Sioux hanged in Mankato on Dec. 26, 1862, for alleged war crimes.