Entitled: "The exercise of armes for calivres, muskettes, and pikes taken from 'The principles of the art militarie; practised in the Warres of the United Netherlands'. Represented by figure, the word of command, and demonstration. Composed by Henry Hexham quarter-master to the regiment of the Honourable Coronell Goring. Part 1, 1637." The engravings of pike and musket are derived from: Jacob de Gheyn. A musket is a muzzle-loaded, smoothbore firearm, fired from the shoulder. Muskets were designed for use by infantry. A soldier armed with a musket had the designation musketman or musketeer. Henry Hexham (1585? - 1650?) was an English military writer.