Social Security Death Index at Ancestry.com contains millions of death dates for former card holders. A great place to start searching for individuals' death dates to help locate obituaries and other information.
Minnesota Reflections is a free online database of digitized materials from many of the state's leading cultural heritage organizations -- including libraries, archives, historical societies, and museums. The Pipestone County Historical Society has supplied to this site the Museum's collection of Close Brothers Land Contracts, many of the Museum's collection of Pipestone Indian School photographs and various other materials. Minnesota Reflections is a project of the Minnesota Digital Library.
Click on Land Patents and fill in the necessary information to search -- State, County and Surname. There are a variety of Land Patents on this site, including Cash Entry, Homestead and Military Warrant Patents.
Pipestone Indian School Student Files, 1910-1954 at the National Archives in Kansas City. Records of the Bureau of Indian Affairs. Each file is unique, and may include family information, health information, academic records, and correspondence between parents and school officials. Access to records less than 75 years old is restricted.