"He carried, secretly a knotted string": Catholic sailors on English Protestant ships fighting Spain (1568–1595)

’Richard Hitchcock, ‘Samuel Purchas as Editor-A Case Study: Anthony Knyvett’s Journal’, The Modern Language Review 99, no. 2 (2004): 301-12

Cheryl A Fury, Tides in the Affairs of Men: The Social History of Elizabethan Seamen, 1580-1603 (London, 2002), 114-123