Amsterdam, Danckerts, Cornelis (I), Northern Netherlands, Illustration In what order the Spanish and Dutch fleets were divided when the battle would take place, The battle orders of the fleets before the sea battle at the Downs, 1639, Sheet with two representations of the battle orders of the Dutch and Spanish fleets in the month of September preceding the sea battle at the Downs between the Spanish fleet under the command of Antonio de Oquendo and the Dutch fleet under Maarten Harpertsz. Tromp, October 21, 1639. On the left a map of the English coast, the Channel and part of the French coast, with the movements and the position of the Dutch and Spanish fleets. On the right a view of the fleets off the coast, in the foreground a Triton with four sea horses. The two representations separated by a statue of Minerva. Marked top right: No. Text sheet with a print of the naval battle at Duins