£2,500
By LEWIS, Meriwether; and William CLARK, August 10, 1807.
£10,000
By [HEATHER, William, and] John William NORIE, 1816 additions to 1823.
£6,000
By [after ROBERT DE VAUGONDY, Gilles and Didier], [1767]
£9,500
By PACIFIC VENTURES, 1984.
£500
By LEBOURGUIGNON-DUPERRE, Gabriel-Cyprien; ARAGO, Jacques Étienne Victor, 1833.
A revolution in Geology – “The Map that Changed the World”
To Abraham Ortelius, “the most brilliant and best of good friends” 

