Backmarks
You will often find photographer advertisements on the backs of images. From simple to elaborate they can be extremely helpful when it comes to researching an image.
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Unknown Woman (CDV) - Blue and Black Album
Backmark: Thomas & Treadwell, / Stinson Block, / Gouverneur, N.Y. / Duplicates like this can be had at any time. 4 1/4 x 2 1/2 inches CDV from the Blue and Black Album.
CDVcarte de visite1199vignetteThomas and TreadwellThomas TreadwellThomasTreadwellGouverneurNY
