Dutch Captain: Jan Krijnssen (or Crijnssen)

Jan Krijnssen served the Admiralty of Zeeland. He commanded the small frigate Schakerlo during the Second Anglo-Dutch War. In June 1665, he fought in the Battle of Lowestoft, where he was assigned to Jan Evertsen's squadron. In August 1665, he was with De Ruyter's fleet. In 1666, he fought in the Four Days' Battle, where he was assigned to Cornelis Evertsen de Oude's squadron. Cornelis Evertsen de Jongste commanded the Schakerlo in the St. James's Day Battle. The Schakerlo had dimensions 106ft x 26ft x 10ft. She carried 30 guns in the Four Days' Battle: 8-8pdr, 5-brass 6pdr, 12-iron 6pdr, 3-4pdr, and 2-3pdr. Her crew in the battle was 105 sailors and 30 soldiers. She had 5 killed and 10 wounded. Sources:

1. Gerard Brandt, Het Leven en Bedryf van den Heere Michiel De Ruiter, 1687.

2. Frank Fox, A Distant Storm: the Four Days' Battle of 1666, 1996.

3. H.A. van Foreest and R.E.J. Weber, De Vierdaagse Zeeslag 11-14 Juni 1666, 1984.