Mapa y Tabla Geografica de leguas comunes que ai de unos a otros lugares y ciudades principales de la America Septentrional.... Dedicado al excmo Sr D. Augustin de Ahumada y Villalon....

Extremely rare map of which very few copies are known. the map represents in a central inset the Viceroyalty of New spain and below a table with the distances and coordenates and zodiac signs of the principal sites. the dedication joint with a figure of an indian on the upper left side. The mexican simbols of the eagle and a serpent on a cactus. A view of Veracruz and S Juan de Ulloa castle is at left of the tree with the coat of arms of the Viceroy marquis of Amarillas to whom the map is dedicated. 
Authorship: Some survey led to think in a jesuit ( father Ignacio rafael Coromina  as the author of this map ( 1709-63) who arrived to mexico in 1749 and published a a rare map : Mapa y tabla de la America Septentrional.
the marquis of the Amarillas ( Viceroy) was in office from 1755 until 1760 when he died at Mexico. 
census of Copies:
- Academia de la Historia Madrid ; included in a composite atlas with XVIII maps by Tomas Lopez.
-John Carter Brown Library, loose copy.
-Library of Congress: manuscript in color most probably of XIX cenrtury without author or date.
-Mexico Museo Nacional de Historia ( Chapultepec Castle) not digitalized
- Barry Ruderman, good example with inv nr 32462 sold some years ago.