21 LL/34672 |  | Advert for S.D. Humphrey, Photographic Chemist 1858 Advert Google Books
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22 LL/34674 |  | Advert for Hegan & Escott, 475 Main Street, Louisville, Ky. 1858 Advert Google Books
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23 LL/34675 |  | Advert for Garrigues & Magee, No.108, North Fifth Streey, above Arch, Philadelphia 1858 Advert Google Books
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24 LL/34773 |  | Wholesale List of Cheap Stereoscopes & Views, manufactured by D. Appleton & Co. 1861, 12 January Advert Google Books
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25 LL/35354 |  | C.E. Clifford - Photography Apparatus and Chemical Warehouse 1856 Advert Google Books
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26 LL/34464 |  | Wholesale Photographic and Optical Warehouse. J. Solomon 1864 Advert Google Books
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27 LL/9829 |  | Richard E. Walzl Advertising card for photographic supplies from Richard Walzl, Baltimore n.d. Carte de visite National Gallery of Canada, The Origins of Photography: The Matthew R. Isenburg and Enhanced Isenburg Collections 1840-1880
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28 LL/9830 |  | Richard E. Walzl Advertising card for photographic supplies from Richard Walzl, Baltimore (Detail) n.d. Carte de visite National Gallery of Canada, The Origins of Photography: The Matthew R. Isenburg and Enhanced Isenburg Collections 1840-1880
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29 LL/9828 |  | Richard E. Walzl Portrait of Richard Walzl n.d. National Gallery of Canada, The Origins of Photography: The Matthew R. Isenburg and Enhanced Isenburg Collections 1840-1880
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30 LL/35809 |  | Unidentified photographer/creator Supplement to the "Photographer's Friend: A Priced Catalogue of Photographic Requisites of Superior Excellence, Furnished by Richard Walzl, Baltimore, Md. 1871 Magazine page, detail Google Books
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31 LL/35810 |  | Unidentified photographer/creator Supplement to the "Photographer's Friend: A Priced Catalogue of Photographic Requisites of Superior Excellence, Furnished by Richard Walzl, Baltimore, Md." 1871 Magazine page, detail Google Books
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32 LL/35811 |  | Unidentified photographer/creator Supplement to the "Photographer's Friend: A Priced Catalogue of Photographic Requisites of Superior Excellence, Furnished by Richard Walzl, Baltimore, Md." 1871 Magazine page, detail Google Books
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33 LL/35815 |  | A Glance into the Future: or, the Wise and the Unwise 1871 Advert Google Books
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34 LL/35822 |  | Office of the Photographer's Friend, R. Walzl, No.103 West Baltimore Street, Baltimore, MD. 1871 Advert Google Books
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35 LL/35823 |  | Office of the Photographer's Friend, R. Walzl, No.103 West Baltimore Street, Baltimore, MD. 1871 Advert, detail Google Books
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36 LL/35816 |  | Southern Headquarters, For Photographic Requisites - Richard Walzl 1871 Advert Google Books
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37 LL/34460 |  | London Stereoscopic Company Notice to Photographers of "Cartes De Visite" 1861 Advert Google Books
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38 LL/34769 |  | London Stereoscopic Company Catalogue of Binocular Pictures of the London Stereoscopic Company 1856 Advert Google Books
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39 LL/34770 |  | London Stereoscopic Company Catalogue of Binocular Pictures of the London Stereoscopic Company 1856 Advert Google Books
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40 LL/34771 |  | London Stereoscopic Company Description and Prices of Sir David Brewster's Lenticular Stereoscopes 1856 Advert Google Books
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