Five best: books on exploration

Laurence Bergreen, author of the recently published Marco Polo: From Venice to Xanadu, named a five best list of books on exploration for Opinion Journal.Number One on his list:Through the Dark Continent by Henry M. Stanley (1878)."Dr. Livingstone, I presume." Welsh-born American journalist Henry M. Stanley (1841-1904) uttered those words, or so he claimed, upon tracking down the Scottish