A bold bad man, that dar'd to call by name / Great Gorgon, prince of darknes and dead night, / At which Cocytus quakes and Styx is put to flight.

With Broad-arrow, or But, or Prick, or Rouing Shaft, At Markes full fortie score, they vs'd to Prick, and Roue.

a grassy knoll

They were probably surprised that Jack had etiquette at all, but despite the skates and Jack Strops and their various highly dubious shore activities, when on board, Jack had enormous pride and respect for RN tradition.