Civil War Photograph: A. Pinkerton, President Lincoln and J. McClernand, 1862.
It is in the public domain and available to the general public.
Antique 1860s Civil War CDV Photo Alexander Gardner Washington DC Bearded Man
(2.5″ x 4″). The portrait displays nice, rich tones with great facial clarity. The stamp ink is clear, dark, and perfectly legible. A clean, pristine example of studio mark provenance.