The Senate, however, was not so susceptible to popular impressions, and the bill, prepared in obedience to the mandate of the House, never got farther than the desk of the Senate Chamber. The pro-slavery majority in that body held firmly together till near the close of the session, when they attempted to bring in the new territories without any restriction as to slavery, by attaching what is called "a rider" to that effect to the Civil Appropriation Bill. The House resisted, and returned the bill to the Senate with the rider unhorsed. A committee of conference failed to agree. Mr. McClernand, a Democrat from Illinois, then moved that the House recede from its disagreement, which was carried by a few Whig votes, to the dismay of those who were not in the secret, when Richard W. Thompson (who was thirty years afterwards Secretary of the Navy) instantly moved that the House do concur with the Senate, with this amendment, that the existing laws of those territories be for the present and until Congress should amend them, retained. This would secure them to freedom, as slavery had long ago been abolished by Mexico. This amendment passed, and the Senate had to face the many-pronged dilemma, either to defeat the Appropriation Bill, or to consent that the territories should be organized as free communities, or to swallow their protestations that the territories were in sore need of government and adjourn, leaving them in the anarchy they had so feelingly depicted. They chose the last as the least dangerous course, and passed the Appropriation Bill in its original form. Mr. Lincoln took little part in the discussions incident to these proceedings; he was constantly in his seat, however, and voted generally with his party, and always with those opposed to the extension of slavery. He used to say that he had voted for the Wilmot proviso, in its various phases, forty-two times. He left to others, however, the active work on the floor. His chief preoccupation during this second session was a scheme which links itself characteristically with his first protest against the proscriptive spirit of slavery ten years before in the Illinois Legislature and his immortal act fifteen years afterwards in consequence of which American slavery ceased to exist. He had long felt in common with many others that the traffic in human beings under the very shadow of the Capitol was a national scandal and reproach. He thought that Congress had the power under the Constitution to regulate or prohibit slavery in all regions under its exclusive jurisdiction, and he thought it proper to exercise that power with due regard to vested rights and the general welfare. He therefore resolved to test the question whether it were possible to remove from the seat of government this stain and offense. [Sidenote: Gidding's diary, January 8, 9, and 11, 1849: published in the "Cleveland Post," March 31, 1878.]