Rehn & Sons, n.d., Backmark for "Rehn & Sons' New and Commodious Ground Floor Galleries, 510 Arch Street, Philadelphia", Carte de visite, back, Private collection of Laddy Kite, LL/101409
Rehn & Sons, n.d., Backmark for "Rehn & Sons' New and Commodious Ground Floor Galleries, 510 Arch Street, Philadelphia", Carte de visite, back, Private collection of Bill Jones, LL/121774