National Geographic : 1931 Jan
Photograph by Capt. A. W. Stevens BELOW PERNAMBUCO THE EXPEDITION FLEW UP THE GREAT RIO SAO FRANCISCO TO PHOTOGRAPH THE ROARING PAULO AFFONSO FALLS Although she was built to land only on water, Pilot Hawkins flew the big seaplane Argentina far inland, over deep gorges and turbulent floods, that the first aerial photographs of the great Brazilian cataracts, estimated as some 265 feet in height, might bemade (see text, page 70). Engineers calculate that more than I,ooo,ooo horsepower could be developed here. Both above and below the falls theSao Francisco River isnavigable.