The Ecuadoran postal
service describes this map as one made by Fr. Samuel
Fritz who mapped the territory on the upper Maraņon between Peru and Quito. The
map was first printed in 1707 and later a revised version was included
in Condamine's report of his expedition published in Paris in 1745.
However, the map is not by Fr. Fritz, but rather by Charles Marie de
La Condamine on the basis of charts which he drew during his voyage to
Peru. (See the map below the stamp.)