DAVE DAVIES, HOST:
This is FRESH AIR. I’m Dave Davies, in for Terry Gross. Our guest, writer Candice Millard, has a knack for burrowing into a little-explored corner of history and spinning out a page-turning yarn that illuminates a part of our past. Her latest book details the efforts of mid-19th century British explorers to find the source of the Nile River. One was a brilliant linguist, writer and…