Donner Party member James Reid and his family are being collected rolls called Lincoln on them among their most cherished relics, the Abraham Lincoln Presidential Library and Museum said in a statement issued Monday.
Group of librarians, historians and experts on hand combined forces to confirm that the letter Lincoln was one of the documents, which list of Lincoln and volunteer soldiers who fought in the 1832 Black Hawk War.
"We often find documents that detail the fascinating stories about the life of Abraham Lincoln's time, but is rather rare for this document so intriguing stories after it was written," said Daniel Stowell, director of the Papers of Abraham Lincoln. "This part of the documents in detail the military service of Lincoln, and that they were accompanied by Donner Party in California, makes them doubly important."