William Crispin doesn't appear in R. C. Anderson's captains list

William Laird Clowes's The Royal Navy, a History from the Earliest Times to the Present lists William Crispin as the captain of the 4th Rate Laurel, which was in William Penn's fleet sent to the Caribbean in 1654. I previously posted the list of ships for that fleet. R. C. Anderson only lists Richard Newberry as captain for the Laurel in 1653 to 1654, and Henry Kirby as captain in 1655. This will require further investigation to sort this out. Sources:

1. R. C. Anderson, List of English Naval Captains 1642-1660, 1964.
2. William Laird Clowes, The Royal Navy: A History from the Earliest Times to the Present, Vol.II, 1898.