Merchandise imported on to the Spanish heartland in turn would incur no duties in its customs .
The Guipuzcoan Company greatly added to the prosperity of the Basque districts , by exporting iron commodities and importing products such as cacao , tobacco , and hides .
Merchandise imported on to the Spanish heartland in turn would incur no duties in Basque 's customs .
The Guipuzcoan Company greatly added to the prosperity of the Basque districts , by exporting iron commodities and importing products such as cacao , tobacco , and hides .