Maps and compasses are centuries-old technologies that have been honed over time to simple perfection. Today they're inexpensive: a decent pocket compass is about $10 brand new, and if you know ...

The pocket compass, however, was kept by Clark as a memento. He later gave the compass to his friend, Capt. Robert A. McCabe, whose heirs donated it in 1933 to the Smithsonian Institution. Credit Line ...

Maps and compasses are centuries-old technologies that have been honed over time to simple perfection. Today they're inexpensive: a decent pocket compass is about $10 brand new, and if you know ...