Untitled (Bird with Sunflower), circa 1950s
oil,
signed lower right
19 x 15 inches
Reference: 25870
Rockies and Water
oil,
signed lower left, titled verso
18 x 24 inches
Reference: 24692
Old Mine Dump - Ward, Colorado, 1929
oil,
signed and dated lower right, titled verso
18 x 24 inches
Reference: 26299
Hidden Meadow (Colorado Mountain Landscape), 1979
tempera,
signed lower right, dated and titled verso
19 x 27 inches
Reference: 25014
Untitled (Aspen Grove in Autumn)
oil,
signed lower right
32 x 39 inches
Reference: 21255
Night Garden / Noon Garden, 1985
mixed media,
signed lower right
70 x 40 inches
Reference: 21954
Rising Moon (Colorado Mountain Landscape), 1975
watercolor,
signed lower right, date and titled verso
30 x 22 inches
Reference: 25012
Flight #3, 1981
acrylic,
signed lower right, titled and dated verso
30 x 24 inches
Reference: 17955
Untitled (Mountains, Colorado), circa 1920
oil,
signed lower right, estate stamp verso
16 x 12 inches
Reference: 14794
Untitled (Mountains, Colorado), circa 1920
oil,
signed lower right, estate stamp verso
12 ¼ x 16 inches
Reference: 14795
Untitled (Abstract in Yellow, Orange and Black)
oil,
signed lower right corner
34 x 44 inches
Reference: 26463
On Coming Storm (Colorado Mountain Landscape), 1955
watercolor,
signed lower right
21 ½ x 29 ½ inches
Reference: 25064
Mount Webster (Colorado), 1960
oil,
signed lower right, titled and dated verso
25 x 41 inches
Reference: 25876
Hopi Point, Grand Canyon, Arizona, circa 1925
oil,
signed lower right "N.H. Knopf", titled verso
12 x 16 inches
Reference: 17965
Home Economics (Cornell University), circa 1937
oil,
attributed
28 ½ x 35 ¾ inches
Reference: 25278