When Mr. Pitt saw the sketch of this engine of simple construction, easy application, and powerful effect, he observed that if Introduced into practice it would lead to the annihilation of all military marines, It was therefore agreed not to use it,—But when I speak of my interest and that of my friends in these inventions, I must call the particular Attention of the Arbitrators to this engine to Shew that while in france I might have brought forward this system to the infinite Injury of England; I did not bring it forward but came to this Country by Invitation to explain the engines to government; and receive what might be considered a fair equivalent for inventions of such magnitude, leaving them to government to use or not as they might think proper; It must therefore be considered that my negative to France is a Positive advantage to England, and out of these Ideas will arise considerations on such sums or annuity as a Great nation can afford to pay for her own security, and which should in reason satisfy men possessed of inventions the consequences of which are incalculable, After what has been said on the practice of the instantanious Bomb, it will be seen that the submarine Vessel is not of much importance nor necessary to Carry such engines into effect from England against France, or from France against England, but it would be of the first importance to the Sweeds, Danes, Dutch, Spaniards or Portuguise in a War against England for with such vessels they could come without risque and anchor instantanious Bombs in the British channel in the mouth of the Thames in the roadsteads and, along the coast, and distress the commerce to as great a degree as before described, Each submarine Vessel constructed in the best manner would cost about 8,000 £. 10 of them could be built for 80 Thousand pounds, and each of them requiring 6 men to Navigate them, the total would be 60 men. Each Vessel could carry 30 bombs the ten could convoy 300, Besides the Bombs each could carry water and provisions for 6 men for 6 weeks, they are therefore calculated to navigate all the narrow seas of Europe and might anchor Bombs in any channel or roadstead where it might be thought necessary; Thus it is that this invention of submarine navigation and Submarine Bombs, gives to the minor maritime powers a decided advantage over the Major maritime Nations, The manner of attacking a single ship with two clockwork bombs has been explained in plate the tenth; which mode I conceive will be allowed to be less expensive than fire ships and attended with less Risk than Bordage or any mode now in practice