In a May 1653 list the Roskam is listed as a Rotterdam Directors' ship

In Witte de With's journal, on page 121 from May 1653, he listed what he said were four Rotterdam Directors' ships. He actually only has the captains' names, the guns, and the crew size. We can supply the ship names:

Adm   Ship            Guns Crew Commander
R-Dir Hollandia       26    95  kapitein Ruth Jacobsz Buys
R-Dir Roskam          24    95  kapitein Corstiaen Eldertsz
R-Dir Sint Pieter               Sijmon Cornelisz van der Meer
R-Dir Prins           38   168  Jacob Cleijdijck

The Roskam is usually considered to be a ship hired by the Admiralty of the Maze (or Rotterdam), rather than the Directors. From May to August 1653, the lists seem to have the ships assigned to different organizations than we have thought, based on other sources. We believe that the Sint Pieter carried 28 guns and had a crew of about 93 men.