National Geographic : 1964 Feb
institute's beautiful jungle headquarters. From here missionaries who are also linguis tics experts fan out to work with a total of 32 tribes. Their primary purpose is to learn the primitive languages, reduce them to writ ing, and translate the Bible. The SIL operates a superb flying service. One of the pilots, Floyd Lyon of Texas, flew us in a pontoon-equipped Cessna-180 to visit the Shapra tribe in Peru's far north, close to Gray snake on a green path, the Ucayali meanders through jungle. Like most Peru vian rivers, it rises in the Andes close to the Pacific, tumbles east from the Continental Divide, and curls many miles to join the Amazon and eventually the Atlantic. Jun gle covers three-fifths of Peru's area but holds only about five percent of her people. 261 KODACHROMEBY KENNETH F. WEAVER,NATIONALGEOGRAPHICSTAFF © N.G.S.