 In 1794 they took the engraving plates to France so they could produce more maps for their own use and to prevent any enemy from acquiring copies.Louis Capitaine, a French engineer, copied it and produced 2 versions one with 69 sheets and a smaller scale version on six sheets, which was sold commercially.During the Waterloo Campaign the Duke of Wellington had a copy of the six sheet version as it is probable that Prince Blucher also had a copy of the six sheet version.