In presenting to the world the record of a transaction, probably the most barbarous which the history of modern warfare can furnish, we cannot refrain from remarks.--Whatever our feelings may be, upon a subject so amply calculated to excite the indignation and abhorrence of every friend to humanity, and every one who has respect for the laws of civilized and mitigated warfare, we will, nevertheless, refrain, so far as the circumstances of outraged humanity will permit, from the violence of invective, and wholly from unwarranted crimination. Those, into whose hands these documents may fall, will, however, preserve them as a monument erected to the memory of their slaughtered countrymen, and a memento of the unfeeling cruelty of our late enemy. Though we are far from believing that there are not persons of noble and humane minds in the English nation, yet, a uniformity of conduct, on the part of the Government and its agents, has taught us to believe that they, at least, are blood thirsty and cruel. The incarceration of Americans in the Jersey Prison Ship at New-York, and Mill Prison, in England, in the Revolutionary war, raised in the minds of the sainted heroes of those times, the most exalted feelings of indignation and abhorrence. The history of those prisoners, where hundreds were compelled to wear out an existence, rendered miserable by the cruelty of an enemy, professing a reverence for the sublime principles of Christianity, is already familiarized to the minds of the American people. If the feelings of Americans were then indignant, what should they be, on beholding those cruelties renewed with more than ten fold severity? The conduct of Thomas George Shortland, the agent at Dartmoor Prison, is such as should "damn him to everlasting fame." Upon what principles the conduct of this man, precedent to the ever memorable 6th of April, 1815, can be justified, we cannot determine. The indiscriminate confinement of both officers and men in the same prisons, and those the most unfit, decayed, and loathsome of any which the Government could furnish, was an infraction of the established laws of civilized nations for the treatment of prisoners of war. It was equally abhorrent to the principles of humanity, and only sanctioned by British governmental agents, and those petty Nations of Savages, whose known usages of warfare have hitherto kept them beyond the pale of national law. The history of modern European wars can furnish no parallel to this part of the history of Dartmoor. But when we arrive at the slaughter of prisoners on the 6th of April, the climax of barbarity is complete, and the mind is sated with the contemplation of principles as shocking to humanity as the consequences are degrading to the character of the English nation.