Amendment to Section 3 of the Committee's Report, to come in after the words "retaining and taking away persons so bound to labor:"--"but the bringing into said District of persons held to service for the purpose of being sold, or placed in depot to be afterwards transferred to any other place to be sold as merchandise, is forever prohibited, and Congress may pass all necessary laws to make this prohibition effectual; nor shall Congress have," &c. The PRESIDENT:--The Conference will proceed to the order of the day, and Mr. POLLOCK has the floor: Mr. POLLOCK:--Brevity is always a virtue. I intend to practice that virtue now. I would not make a single observation, if I did not feel that by keeping silence I should neglect my duty. As it is, I do not intend to occupy the time of the Conference more than twenty minutes. When the committee upon the subject invited Pennsylvania to furnish a block for the Washington Monument in this city, they asked also for a motto, to be inscribed upon it, which should express some idea characteristic of Pennsylvania. What was the motto selected in behalf of that great State? Did we go to Germantown and invoke the memories of the mighty dead? Did we ask the motto of Valley Forge? No, brothers, no! Pennsylvania stood by the side of the grave of Penn, the man of peace, and in his example she found her motto, and it stands inscribed upon her contribution to that monument to the Father of his Country to-day. There may it stand forever. "_Pennsylvania was founded by deeds of Peace._" How noble the sentiment! How characteristic of that Commonwealth! Animated by the same sentiment, filled with the same spirit, herself asking nothing, requiring nothing, Pennsylvania comes into this Conference and says to every delegate here, "_Peace, Brothers, Peace._" She is not for war. She believes that the power of kindness is far greater than that of the sword; that in the affection of brother toward brother there is greater strength than in all the iron contained in all her thousand hills and mountains. She comes here at the instance of a sister. She heard the voice of that sister asking for consultation, and she obeyed it. She is here, and in the right spirit. A word now as to the motive of Virginia in calling the States together. Some object that Virginia comes bearing the olive branch on the point of the bayonet. Not so, sir. She is placed in a peculiar position, and I appreciate it. She does not make use of threats. These exist only in the imagination of gentlemen. I am willing to meet her here upon the very ground she takes, and unite with her in saying, "Our Union as it is, now and forever." We are here taking counsel, not with traitors, not with secessionists, but with lovers of the Union.