The brothers were also involved in another border irregularity when they bought McKissick Island a mile south of Hamburg. They thought at the time the island in the Missouri River was attached to Nebraska territory. The river changed course in 1867 resulting in the island becoming physically attached by dry land to Missouri and cut off from Nebraska by the main channel. Missouri and Nebraska both claimed the island and it was decided in 1904 by the U.S. Supreme Court that it belonged to Nebraska, although the states did not formally agree to the arrangement until 1999. In the meantime students from the Nebraska island passed through Missouri en route to being educated in Hamburg in Iowa.