Excellent indeed. While the illustrations are too late to show the armour styles of Richard Beauchamp's time (he had died in 1439) they are a fascinating glimpse of military styles and equipment pertaining at the end of the so-called 'Wars of the Roses'.
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Note also in this one:
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that two of the cannons project OVER the bulwark of the ship and not through it. There is no gunport as such. In documents of the time some artillery is referred to as 'waist guns' with the inference that these were the heaviest. The two pieces shown are in the 'waist' on the ship (the low part between the fore and after castles). This also differences them from other pieces which may have been lighter swivels or hand-held pieces which simply hooked over the bulwark to fire.
Note also that documents of the time refer to such heaver 'stone guns' in the waist (i.e. throwing stone cannon balls) as having more than one breechblock. The loose and removable wrought-iron breechblock contained the powder and wadding. The numbers suggest that up to three breeches per gun were carried on ship as standard.
If this is the case then such breech-loaders may have been capable of some rapid fire at the beginning of the action. With one breechblock loaded and two more standing-by, ready charged, the gunner and his mate would simply have to fire, knock out the wedge behind the first block and remove it, load a shot and the second breechblock and wedge, fire that, and repeat this for breechblock number three. By this time an apprentice may have had time to recharge breechblock number one with some powder for a fourth quick shot. After that firing would slow down as each breechblock was recharged. In effect the breechblock would act like a modern cartridge.
Do not dismiss these stone shot as ineffective either. Mythbusters notwithstanding, stone shot continued into the 16th century – the Spanish Armada used them. Modern tests in Britain have shown that a Spanish stone shot could smash through a wooden railway sleeper, scattering hundreds of wooden splinters behind it and into the ship. About half the stone projectile survived the penetration and had enough force to bury itself in the sand back stop to a considerable distance.
Now… if the multiple breechblocks were standard on land also, and not just a sea-borne luxury, it may give artillery a higher rate of fire in the first few minutes of a battle OR a wise gunner might fire and load only the one breechblock and saved the other two until an enemy assault threatened, banging them off in quick succession loaded with chain shot or wooden cylinders of flints and flint flakes. Such cylinders were recovered from the wreck of the Mary Rose – in effect, flint 'canister' shot.
Barry