WattsOSACAnimas Canyon, Colorado1906 · ChromolithographImage: 8.1 x 12.3 cm (3 3/16 x 4 13/16 in.) 8.9 x 14 cm (3 1/2 x 5 1/2 in.) Frame: 27.9 x 35.6 cm (11 x 14 in.)The Metropolitan Museum of Art
WattsOSECEcho Cliffs, Grand River Canyon1900 · photochromeImage: 26.7 x 52.7 cm (10 1/2 x 20 3/4 in.); Matted: 61 x 76.2 cm (24 x 30 in.)Cleveland Museum of Art
WattsOSCJChief James Garfield Velarde1899 · PhotochromIn mat: 12 x 9 13/16The Metropolitan Museum of Art
WattsOSECEcho Cliffs, Canyon of the Grand River, Glenwood Extension, Colorado1887 · collodion printImage: 42.2 x 54.2 cm (16 5/8 x 21 5/16 in.); Mounted: 51.3 x 62.6 cm (20 3/16 x 24 5/8 in.); Second mount: 61.9 x 72.5 cm (24 3/8 x 28 9/16 in.); Paper: 42.2 x 54.2 cm (16 5/8 x 21 5/16 in.); Matted: 71.1 x 81.3 cm (28 x 32 in.)Cleveland Museum of Art
WattsOSCOCañon of the Rio las Animas1882 · albumen print from wet collodion negativeImage: 42.1 x 53.1 cm (16 9/16 x 20 7/8 in.); Matted: 76.2 x 81.3 cm (30 x 32 in.)Cleveland Museum of Art
WattsOSMHMammoth Hot Springs, Pulpit Terraces1881 · Albumen silver print from glass negative43.0 x 53.1 cm. (16 15/16 x 20 15/16 in.)The Metropolitan Museum of Art
Basaltic Cañon, Foot of Tower Creek1879 · Albumen print, stereoEach image: 9.3 × 7.6 cm (3 11/16 × 3 in.); Card: 10 × 17.8 cm (3 15/16 × 7 1/16 in.)Art Institute of Chicago
The Royal Gorge1879 · Albumen print, stereoEach image: 9.3 × 7.5 cm (3 11/16 × 3 in.); Card: 10.1 × 17.6 cm (4 × 6 15/16 in.)Art Institute of Chicago
Cheyenne Falls1879 · Albumen print, stereoEach image: 9.4 × 7.7 cm (3 3/4 × 3 1/16 in.); Card: 10 × 17.8 cm (3 15/16 × 7 1/16 in.)Art Institute of Chicago
Badlands of Wyoming1879 · Albumen print, stereoEach image: 9.4 × 7.5 cm (3 3/4 × 3 in.); Card: 10 × 17.7 cm (3 15/16 × 7 in.)Art Institute of Chicago
WattsOSMLMystic Lake, M.T.1872 · albumen print from wet collodion negativeImage: 23.3 x 50.7 cm (9 3/16 x 19 15/16 in.); Mounted: 40.6 x 31.5 cm (16 x 12 3/8 in.); Matted: 50.8 x 61 cm (20 x 24 in.)Cleveland Museum of Art
Old Faithful1871 · Albumen printImage/paper: 21.3 × 17.5 cm (8 7/16 × 6 15/16 in.); Mount: 27 × 21 cm (10 11/16 × 8 5/16 in.)Art Institute of Chicago
WattsOSTTThe Trail in West Gallatin Cañon1870 · albumen print from wet collodion negativeImage: 32.9 x 25.1 cm (12 15/16 x 9 7/8 in.); Matted: 50.8 x 40.6 cm (20 x 16 in.)Cleveland Museum of Art
WattsOSCNCurrecanti Needle, Black Cañon of the Gunnison1870 · albumen print from wet collodion negativeImage: 53.3 x 41.2 cm (21 x 16 1/4 in.); Matted: 71.1 x 55.9 cm (28 x 22 in.)Cleveland Museum of Art
WattsOSTCTantalus Cañon, Utah1870 · Albumen silver print from glass negativeThe Metropolitan Museum of Art
WattsOSHRHanging Rock, Clear Creek Canyon1870 · Albumen silver printImage: 21 1/4 × 17 7/16 in. (54 × 44.3 cm) Mount: 27 7/8 in. × 22 in. (70.8 × 55.9 cm)The Metropolitan Museum of Art
Quarrying Granite for Mormon Temple, No. 119 from the series "Views in the Rocky Mountains"1870 · Albumen print, stereoEach image: 9.4 × 7.6 cm (3 3/4 × 3 in.); Card: 10 × 17.6 cm (3 15/16 × 6 15/16 in.)Art Institute of Chicago
The Spanish Peaks1866 · Albumen printImage/paper: 25.8 × 34.2 cm (10 3/16 × 13 1/2 in.); Mount: 40.6 × 50.8 cm (16 × 20 in.)Art Institute of Chicago
Gebouwen en schoorsteenpijpen van een smelterij in Noord-Amerika1860 · photographic support, paper, cardboardwidth: 183 cm, height: 108 cmRijksmuseum
Gezicht op Mount of the Holy Cross in de Rocky Mountains1860 · photographic support, cardboard, paperwidth: 183 cm, height: 107 cmRijksmuseum
Across the Royal Gorge1860 · cardboard, paper, photographic supportwidth: 108 cm, height: 184 cmRijksmuseum
Sphinx in the Louvre1807 · Graphite and gray watercolor wash on off-white wove paper11 5/8 x 9 1/16 in. (29.5 x 23 cm)The Metropolitan Museum of Art
Museum d'Histoire Naturelle: Le Phoque1807 · Graphite on off-white wove paper11 5/8 x 9 1/16 in. (29.5 x 23 cm)The Metropolitan Museum of Art