In his detailed letter of the 18th May 1841, Abraham Petter described the fighting during the course of the Battle of Waterloo on Sunday the 18th June 1815, and the role of the battery of Horse Artillery under his command: ‘Our 32 guns had to endure a terrible cannonade and small arms fire from the French, which was answered effectively. Around 4 o'clock H.R.H., the Prince of Orange warned us to expect a charge from the French cavalry, which soon followed. The French with several thousand horsemen formed for the attack in columns by squadrons, with the Cuirassiers in front, and tried to dislodge us. But the charge was received by our 32 guns; we initially fired round shot, and then canister so that they could not get close to us, which forced them to retreat in disorder. Shortly thereafter, a second charge was attempted, this time with infantry commanded by Maréchal Ney, but this charge also had no effect and was driven off with great loss.' 

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