Red-pigmented Marine Iguana, Punta Suarez, Hood Island, Galapagos Islands, May 28, 1966

Mockingbirds Drinking, Punta Suarez, Hood Island, Galápagos Islands, May 28, 1966

Swallowtail Gulls, Punta Pitt, San Cristóbal Island, Galápagos Islands, May 24, 1966

Sheet Lava, Sullivan Bay, James, Galápagos Islands, March 10, 1966

Side Crater on Sombrero Chino, Jarvis Island from Sombrero Chino, Galápagos Islands, March 11, 1986

Pahoehoe Lava and Green Vegetation, Tower Island, Galápagos Islands, March 23, 1966

Squirt-up Lava, Sullivan Bay, James Island, Galápagos Islands, March 10, 1966

Lava Mound, Sullivan Bay, James Island, Galápagos Islands, March 10, 1966

Lagoon from North with Santiago Island in Background, Jarvis Island, Galápagos Islands, April 1, 1966

Cinder Cones, Sullivan Bay, James Island, Galápagos Islands, March 10, 1966

Surf on Lava Rocks in Bay, Sullivan Bay, James Island, Galápagos Islands, March 10, 1966

Lava Flow and Edge of Caldera, Sombrero Chino, Galápagos Islands, March 26, 1966

Cliffs and Lichen, Jarvis Island, Galápagos Islands, April 1, 1966

Rim of Crater and Bainbridge Rocks, Sombrero Chino, Galápagos Islands, March 11, 1966

Goat Hill and Palo Santo Trees, James Bay, James Island, Galápagos Islands, April 12, 1966

Fernandina Island from Rim, Alcedo Volcano, Isabela Island, Galápagos Islands, May 5, 1966

Palo Santo and Cactus, Cartago Bay, Isabela Island, Galápagos Islands, May 8, 1966

Seals on Beach, Hood Island, Galápagos Islands, May 25, 1966

Miconia Trucks and Ferns, Santa Cruz Island, Galápagos Islands, April 22, 1966

Red Pahoehoe Lava, Perry Isthmus, Isabela Island, Galápagos Islands, May 8, 1966