Dutch Captain: Jan Janszoon Bleecker

Jan Janszoon Bleecker served the Admiralty of the Noorderkwartier. In 1636, he commanded the ship Eendracht (31 guns, 6 of brass and 25 of iron, and a crew consisting of 90 sailors and 20 soldiers). The Eendracht was a vessel of 300 lasts. In late 1637, he was near Hellevoetsluis under the command of Vice-Admiral Berchem, along with captains Keert de Koe, Ham, and van der Parre. If the captain that Charles Boxer calls "Bleijcker" is the same man, and it is possible, as he served the Admiralty of the Noorderkwartier, along with Captain Keert de Koe, then he was with Witte de With and probably fought in the Battle of the Downs in 1639. Sources:

1. Dr. M.G. De Boer, De Proefjaar van Maarten Harpertszoon Tromp 1637-1639, 1946.
2. Charles R. Boxer, The Journal of Maarten Harpertszoon Tromp Anno 1639, 1930.
3. Dr. F. Graefe, De Kapiteinsjaren van Maerten Harpertszoon Tromp, 1938.