This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The advance guard of the Grand Army of the United States crossing the Long Bridge over the Potomac at A.M. on May Boston Public Library. print wood engraving Genre Wood engravings Periodical illustrations Notes Published in Harper's Weekly Volume June Collection Winslow Homer Collection Location Boston Public Library Print Department