From the record
“The Mound City Civil War Naval Hospital was a naval hospital in Mound City, Illinois, used by the United States Navy during the Civil War. The hospital was established in 1861 in an existing brick building claimed by the U.S. government.”
Wikipedia article Mound City Civil War Naval Hospital, CC BY-SA 4.0.
One of 4 National Register listings published here for Pulaski County · listed in 1974 · category: Building · built in 1861.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

