Yellow and Green Lichen, Great Spruce Head Island, Maine, July 11, 1969

Lichen on Boulder, Green Flake Lichen, Great Spruce Head Island, Maine, June 26, 1969

Spruce Log on Forest Floor, Great Spruce Head Island, Maine, July 1, 1969

Seaweed and Schist, Great Spruce Head Island, Maine, July 15, 1971

Bunchberries, Great Spruce Head Island, Maine, July 27, 1971

White Weathered Rocks and Seaweed, Great Spruce Head Island, Maine, July 27, 1973

Details of Gneiss Rock, Oak Island, Maine, August 26, 1973

Lichen on Glaciated Basalt, Sugarloaf Island, Barred Islands, Maine, August 31, 1972

Leathery Lichen, Rock Tripe, Great Spruce Head Island, Maine, August 28, 1972

Long-Stemmed Grasses, Great Spruce Head Island, Maine, August 1, 1973

Lichen and Quartz Vein, Great Spruce Head Island, Maine, August 14, 1973

Beach Stones at Low Tide, Seal Island, Maine, August 22, 1972

Fungus and Dead Leaves, Great Spruce Head Island, Maine, August 24, 1972

Lichen on Poplars with Blackberries, Great Spruce Head Island, Maine, September 2, 1972

Salt Grass and Rain Pool, Great Spruce Head Island, Maine, August 14, 1973

Fallen Spruce Tree, Great Spruce Head Island, Maine, July 26, 1974

Chinstrap Penguins, Stigant Point, King George Island, Antarctic Peninsula, Antarctica, January 11, 1975

Chinstrap Penguins, Stigant Point, King George Island, Antarctic Peninsula, Antarctica, January 11, 1975

Whale Bones, Port Lockroy, Antarctica, January 14, 1975

Chinstrap Penguins, Stignant Point, King George Island, Antarctica, January 12, 1975