schooled both in the use and preparation of maps and plans. Diego de Saavedra Fajardo, in his famous Idea de un pr�ncipe pol�tico cristiano (Madrid, 1642), an educational treatise especially prepared for Baltasar Carlos, advised that princes on the importance of cartography and urged them to become familiar with maps as they were useful for both political and military purposes. The discovery of the Infante�s �lost� drawing suggests Saavedra Fajardo�s suggestion did not fall on deaf ears. It also indicates �and this is in keeping with the aims of the New Map History � that the Habsburg monarchy, contrary to long-standing ideas about the shortage of cartographic materials in seventeenth-century Spain, placed a high priority on the production of maps, especially those with military and strategic value. Not surprisingly, maps of this kind tended to be regarded as state secrets, the seventeenth-century equivalent of arcana imperii of ancient Rome, but owing to the �publication� of this CD, we now have a much better sense of what these �secret� maps were like.

Richard L. Kagan
Johns Hopkins University
USA