This stunning antique image was found in an estate sale of a cartographer in the Washington DC area.  PLEASE NOTE I AM NOT AN EXPERT IN ANTIQUE MAPS OR ANTIQUE PUBLICATIONS.  I am confident that my listings of images from that estate are authentic; I confirmed they are not modern prints using a loop.  Information I provide on them was found online; other appropriate information provided by the Ebay community is appreciated.  

I am unable to find this particular engraving online.  The title is, "Schleswig", and the engraver's initials, "A.H. Payne", with two very small letters after the name, looks like "s.o.".  The engraving measures 8.2" by 5.2" on its outside borders, and the image alone without the caption is, 5.7" by 3.6".  A very possible clue to its content was the newspaper clipping from "The Illustrated London News" from April 22, 1848, with the caption, "Schleswig and the Chateau Gottorp - German Volunteers on Their March From Kiel to the Frontier".

EPH