There are two classes of persons opposed to the continued existence of slavery in the United States. The first are those who are actuated by sentiments of philanthropy and humanity, but are at the same time no less opposed to any disturbance of the peace or tranquility of the Union, or to any infringement of the powers of the States composing the confederacy. Among these may be classed the society of "Friends," one of whose established principles is an abhorrence of war in all its forms, and the cultivation of peace and good will amongst mankind. As far back as 1670, the ancient records of their society refer to the peaceful and exemplary efforts of the sect to prevent the holding of slaves by any of their number; and a quaint incident is related of an eccentric "Friend," who, at one of their monthly meetings, "seated himself among the audience with a bladder of bullock's blood secreted under his mantle, and at length broke the quiet stillness of the worship by rising in full view of the congregation, piercing the bladder, spilling the blood upon the floor and seats, and exclaiming with all the solemnity of an inspired prophet, 'Thus shall the Lord spill the blood of those that traffic in the blood of their fellow men.'" The second class are the real ultra abolitionists--the "reformers" who, in the language of Henry Clay, are "resolved to persevere at all hazards, and without regard to any consequences, however calamitous they may be. With them the rights of property are nothing; the deficiency of the powers of the general government is nothing; the acknowledged and incontestible powers of the State are nothing; civil war, a dissolution of the Union, and the overthrow of a government in which are concentrated the fondest hopes of the civilized world, are nothing. They are for the immediate abolition of slavery, the prohibition of the removal of slaves from State to State, and the refusal to admit any new State comprising within its limits the institution of domestic slavery--all these being but so many means conducive to the accomplishment of the ultimate but perilous end at which they avowedly and boldly aim--so many short stages, as it were, in the long and bloody road to the distant goal at which they would ultimately arrive. Their purpose is abolition, 'peaceably if it can, forcibly if it must.'" Utterly destitute of Constitutional or other rightful power; living in totally distinct communities, as alien to the communities in which the subject on which they would operate resides, as far as concerns political power over that subject, as if they lived in Asia or Africa, they nevertheless promulgate to the world their purpose to immediately convert without compensation four millions of profitable and contented slaves into four millions of burdensome and discontented negroes.