images, left to right, top to bottom:
 > Taku Glacier, Alaska, 1929; Grand Pacific Glacier, Glacier Bay, Alaska, 1931
 > Outlet glaciers, Royal Society Fiord, Northeast Baffin Island, Canada; Holgate Glacier, Kenai Peninsula, Alaska
 > Columbia Glacier; Alaska; Lamplugh Glacier, Glacier Bay, Alaska, 1941