The practice of impressment was an old grievance which seemed to Americans devoid of any justification. From the British point of view there was much to be said in extenuation of the practice. It should not be forgotten that Great Britain was locked in a life-and-death struggle with a mighty antagonist, and that she had need of every able seaman. Owing to the rigorous life on board of men-of-war, every ship's crew was likely to be depleted by desertions whenever she touched at an American port. Jack Tar found life much more agreeable on an American merchantman; and he rarely failed to procure the needful naturalization papers or certificates which would give him a claim to American citizenship. The right of expatriation was not at this time conceded by the British Government. Once an Englishman, always an Englishman. Surely, then, British commanders might claim their own seamen on the high seas. Officially, at least, they never claimed the right to impress American seamen. Yet where differences of speech were so slight, the provocation so strong, and the needs of the navy so great, search crews were not always careful to distinguish between Britishers and Yankees. The United States never admitted the justice of these claims. To concede the right of search on the high seas was to admit a vast extension of British jurisdiction. As early as 1792, Jefferson had stated the principle for which the United States had consistently contended: "The simplest rule will be that the vessel being American shall be evidence that the seamen on board of her are such." The principle was never accepted by any British ministry. The practice of impressment continued to harass each succeeding administration. In 1806, a crisis seemed at hand. Madison reported to the House of Representatives the names of nine hundred and thirteen persons who appeared to have been impressed from American vessels. How many of these were British deserters under American names, it is impossible to say. The number reported by Madison is at least an index to the sense of injury which the nation felt.