The numerous affidavits accompanying the report made by the committee of the prisoners, together with the reply to the report of Messrs. King and Larpent, afford the most positive testimony in contradiction to many of its prominent features. We can form no other opinion respecting this report, than either that Mr. King was overreached by his colleague, or that he was pre-determined to fritter down the abuses which the British Government and its agents had lavished upon their American prisoners. Why either Messrs. King or Larpent should decline the examination of all the witnesses offered by the prisoners, is wholly inexplicable, unless we attribute to them a mutual and fixed determination to justify the conduct of Shortland and his accomplices, at the expense of criminating hundreds of Americans, who were no less entitled to credibility than either of themselves. Hereafter "let no such men be trusted." The treatment of the prisoners appears to have proceeded from the same principles of inhumanity, which have given rise to the hostile operations of the British Commanders upon our maritime and inland frontiers, during the continuance of the late contest. Such principles belong only to Savages or their allies. The outrages at the river Raisin, Hampton, Havre de Grace, Washington, and those attempted at New-Orleans, it was thought, might have filled the measure of British barbarities. But to the prisons of Dartmoor was transferred the scene of its completion. Americans, armed in defence of their soil, their Constitution, and natural rights, were too invincible to the "veteran" conquerors of the East. Prisoners of war in confinement, and without arms, were selected as the objects upon which they might glut their malice. We have heard much from a certain class of our politicians of the burning of Newark and St. David's; but little have they said of the destruction of Buffalo, of Washington City, or the massacre of our unfortunate countrymen at Dartmoor; and that little has been directed to the justification of the perpetrators. The conflagration of our Capitol, with the appendages of art and taste, and even the slaughter of our countrymen, could not excite in those minds one feeling of indignation; whilst the unauthorized destruction of a few houses, within the territorial limits of our enemy, not only excited their warmest sympathies for the enemy, but their foulest denunciations of our own Government. We might here attempt a comparison of the treatment of each Government to their prisoners. But the contrast is so evident, that we shall commit it to our readers without remark.