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.
Carte de visite from this Album.
Inscribed on recto: Mamie Rooney 8.mo
Backmark: Ph. E. Thuemmler, / 192 Reed St., Milwaukee, Wis. / Equipped not only with large, but the very best of Instruments.