End of Taylor and Rhone Glaciers, Taylor Valley, Antarctica

Canada Glacier, Taylor Valley, Antarctica

Weathered Dyke, Seal Island, Maine, August 22, 1972

Weathered Dyke, Seal Island, Maine, August 22, 1972

Orange Lichen, Peak Island, Maine, August 31, 1972

Orange Lichen, Peak Island, Maine, August 31, 1972

Erratic Boulder on Beach, Barred Islands, Maine, July 24, 1973

Twin Flower and Moss, Great Spruce Head Island, Maine, June 20, 1968

Common Tern's Nest, Barred Islands, Maine, July 11, 1968

Thin Dried Grass, Great Spruce Head Island, Maine, July 24, 1968

Maianthemum and Grass, Great Spruce Head Island, Maine, June 14, 1969

Erratic Boulder with Lichen, Great Spruce Head Island, Maine, July 4, 1968

Sunset Post Office, Sunset Maine, July 27, 1968

Sunset Post Office, Sunset, Maine, July 27, 1968

Lichen and Spruce Seedlings, Great Spruce Head Island, Maine, June 16, 1969

Bolster Basalt, Great Spruce Head Island, Maine, July 11, 1969

Green Lichen on Rock, Great Spruce Head Island, Maine, July 10, 1969

Moss and Dead Tree, Great Spruce Head Island, Maine, July 11, 1969

Lichen on Cliff, Peak Island, Maine, July 24, 1969

Brown and Black Rocks, Great Spruce Head Island, Maine, July 21, 1969