Samuel Pepys, Diary of Samuel Pepys — April, 1668
“ Here was to-day a proposition made to the Duke of York by Captain Von Hemskirke for L20,000, to discover an art how to make a ship go two foot for one what any ship do now, which the King inclines to try, it costing him nothing to try; and it is referred to us to contract with the man. Thence to attend the Council about the business of certificates to the Exchequer, where the Commissioners of the Treasury of different minds, some would, and my Lord Ashly would not have any more made out, and carried it there should not. ”
