Frances Gardiner Davenport, European Treaties bearing on the History of the United States and its Dependencies to 1648 (1917)
“ Upon Spain's command of the sea, as Spain and England were perfectly aware, depended the maintenance not only of Spain's colonial monopoly, but also of her national strength, which was derived from the Indian trade; hence, the great potential importance of uniting the naval forces of the English and Dutch to co-operate against Spain's American fleets. At this time France, on the other hand, had little strength upon the ocean, and sought to defeat Spain on land. ”
