The rare 14th-century portolan chart is worth $7.5 million. Robert Gauthier / Los Angeles Times / Getty Images Last fall, Christieās auctioned off a āhighly unusualā nautical map as part of an estate ...
Alex Clausen is a map dealer. And although that designation may not, at first read, exude adventure and romance, Clausen really is a modern-day treasure hunter. He doesnāt sail the seas in search of ...
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