BOSTON, 4th July, 1844.

To His Excellency George N. Briggs:

SIR—Many years since, I received from the Executive of the Commonwealth a commission as Justice of the Peace. I have held the office that it conferred upon me till the present time, and have found it a convenience to myself, and others. It might continue to be so, could I consent longer to hold it. But paramount considerations forbid, and I herewith transmit to you my commission, respectfully asking you to accept my resignation.

While I deem it a duty to myself to take this step, I feel called on to state the reasons that influence me.

In entering upon the duties of the office in question, I complied with the requirements of the law, by taking an oath "to support the Constitution of the United States." I regret that I ever took that oath. Had I then as maturely considered its full import, and the obligations under which it is understood, and meant to lay those who take it, as I have done since, I certainly never would have taken it, seeing, as I now do, that the Constitution of the United States contains provisions calculated and intended to foster, cherish, uphold and perpetuate slavery. It pledges the country to guard and protect the slave system so long as the slaveholding States choose to retain it. It regards the slave code as lawful in the States which enact it. Still more, "it has done that, which, until its adoption, was never before done for African slavery. It took it out of its former category of municipal law and local life; adopted it as a national institution, spread around it the broad and sufficient shield of national law, and thus gave to slavery a national existence." Consequently, the oath to support the Constitution of the United States is a solemn promise to do that which is morally wrong; that which is a violation of the natural rights of man, and a sin in the sight of God.

I am not in this matter, constituting myself a judge of others. I do not say that no honest man can take such an oath, and abide by it. I only say, that I would not now deliberately take it; and that, having inconsiderately taken it; I can no longer suffer it to lie upon my soul. I take back the oath, and ask you, sir, to receive back the commission, which was the occasion of my taking it.

I am aware that my course in this matter is liable to be regarded as singular, if not censurable; and I must, therefore, be allowed to make a more specific statement of those provisions of the Constitution which support the enormous wrong, the heinous sin of slavery.

The very first Article of the Constitution takes slavery at once under its legislative protection, as a basis of representation in the popular branch of the National Legislature. It regards slaves under the description "of all other persons"—as of only three-fifths of the value of free persons; thus to appearance undervaluing them in comparison with freemen. But its dark and involved phraseology seems intended to blind us to the consideration, that those underrated slaves are merely a basis, not the source of representation; that by the laws of all the States where they live, they are regarded not as persons, but as things; that they are not the constituency of the representative, but his property; and that the necessary effect of this provision of the Constitution is, to take legislative power out of the hands of men, as such, and give it to the mere possessors of goods and chattels. Fixing upon thirty thousand persons, as the smallest number that shall send one member into the House of Representatives, it protects slavery by distributing legislative power in a free and in a slave State thus: To a congressional district in South Carolina, containing fifty thousand slaves, claimed as the property of five hundred whites, who hold, on an average, one hundred apiece, it gives one Representative in Congress; to a district in Massachusetts containing a population of thirty thousand five hundred, one Representative is assigned. But inasmuch as a slave is never permitted to vote, the fifty thousand persons in a district in Carolina form no part of "the constituency;" that is found only in the five hundred free persons. Five hundred freemen of Carolina could send one Representative to Congress, while it would take thirty thousand five hundred freemen of Massachusetts, to do the same thing: that is, one slaveholder in Carolina is clothed by the Constitution with the same political power and influence in the Representatives Hall at Washington, as sixty Massachusetts men like you and me, who "eat their bread in the sweat of their own brows."

According to the census of 1830, and the ratio of representation based upon that, slave property added twenty-five members to the House of Representatives. And as it has been estimated, (as an approximation to the truth,) that the two and a half million slaves in the United States are held as property by about two hundred and fifty thousand persons—giving an average of ten slaves to each slaveholder, those twenty-five Representatives, each chosen, at most by only ten thousand voters, and probably by less than three-fourths of that number, were the representatives not only of the two hundred and fifty thousand persons who chose them, but of property which, five years ago, when slaves were lower in market, than at present, were estimated, by the man who is now the most prominent candidate for the Presidency, at twelve hundred millions of dollars—a sum, which, by the natural increase of five years, and the enhanced value resulting from a more prosperous state of the planting interest, cannot now be less than fifteen hundred millions of dollars. All this vast amount of property, as it is "peculiar," is also identical in its character. In Congress, as we have seen, it is animated by one spirit, moves in one mass, and is wielded with one aim; and when we consider that tyranny is always timid, and despotism distrustful, we see that this vast money power would be false to itself, did it not direct all its eyes and hands, and put forth all its ingenuity and energy, to one end—self-protection and self-perpetuation. And this it has ever done. In all the vibrations of the political scale, whether in relation to a Bank or Sub-Treasury, Free Trade or a Tariff, this immense power has moved, and will continue to move, in one mass, for its own protection.

While the weight of the slave influence is thus felt in the House of Representatives, "in the Senate of the Union," says JOHN QUINCY ADAMS, "the proportion of slaveholding power is still greater. By the influence of slavery in the States where the institution is tolerated, over their elections, no other than a slaveholder can rise to the distinction of obtaining a seat in the Senate; and thus, of the fifty-two members of the federal Senate, twenty-six are owners of slaves, and are as effectually representatives of that interest, as the eighty-eight members elected by them to the House"