The States of Zeeland referred in a letter on 9 August 1588 that the Lord of Dohn, brother of the Lord of Marquette arrived coming from Calais, France where sighted in the morning of the day before yesterday the arrival of the Spanish Armada chased by the British fleet. He counted 120 Spanish ships with in the front 2 galleons and in the back 2 galleasses. At night was a lot of gunfire heard and the next morning when the Spanish was cruising between Calais and Grevelingen, Netherlands they no.ed just 76 ship of all sizes. The Dutch admiral Justinus van Nassau was lying off Dunkirk, France where he was to prevent the prince of Parma to depart that harbour. Van Dohn sighted however no Dutch warships and said that the West-North wind forced the Spanish to enter the Wielingen, Netherlands. The Dutch force commanded by Van Nassau was too weak to oppose the Spanish. He [Van Dohn] asked the States to sent all warships they had with the utmost urgency. Captain Drooge was indeed ordered to collect all small war ships on the rivers and elsewhere and to sent these to the Dutch coasts. Further more was cavalry sent to Soutelande, Netherlands.
Source
Gedrukte notulen Staten van Zeeland no. 5. (Municipal archives Vlissingen, Netherlands inventory 453).
