1872 vs 1877
June 13, 1877 is the date the city of Omaha recognizes as the beginning of the Omaha Public Library for it is the date in which the library board was first appointed.  The library itself recognizes the Second Omaha Library Assocation as the Omaha Public Library and thus uses 1872 as the establishment date.  To reconcile the difference the Omaha Public Library has permission from the city of Omaha to use 1872.  Promotional material for the library use 1872.