The Underground Railroad filled an insignificant place in the general plan for emancipation, even in the minds of the directors. It was a lesser task preparatory to the great work. As to the numbers of slaves who gained their freedom by means of it, there is a wide range of opinion. Statements in Congress by Southern members that a hundred thousand had escaped must be regarded as gross exaggerations. In any event the loss was confined chiefly to the border States. Besides, it has been stated with some show of reason that the danger of servile insurrection was diminished by the escape of potential leaders. From the standpoint of the great body of anti-slavery men who expected to settle the slavery question by peaceable means, it was a calamity of the first magnitude that, just at the time when conditions were most favorable for transferring the active crusade from the general Government to the separate States, public attention should be directed to the one point at which the conflict was most acute and irrepressible. Previous to 1850 there had been no general acrimonious debate in Congress on the rendition of fugitive slaves. About half of those who had previously escaped from bondage had not taken the trouble to go as far as Canada, but were living at peace in the Northern States. Few people at the North knew or cared anything about the details of a law that had been on the statute books since 1793. Members of Congress were duly warned of the dangers involved in any attempt to enforce a more stringent law than the previous act which had proved a dead letter. To those who understood the conditions, the new law also was doomed to failure. So said Senator Butler of South Carolina. An attempt to enforce it would be met by violence. This prediction came true. The twenty thousand potential victims residing in Northern States were thrown into panic. Some rushed off to Canada; others organized means for protection. A father and son from Baltimore came to a town in Pennsylvania to recover a fugitive. An alarm was sounded; men, mostly colored, rushed to the protection of the one whose liberty was threatened. Two Quakers appeared on the scene and warned the slavehunters to desist and upon their refusal one slave-hunter was instantly killed and the other wounded. The fugitive was conveyed to a place of safety, and to the murderers no punishment was meted out, though the general Government made strenuous efforts to discover and punish them. In New York, though Gerrit Smith and a local clergyman with a few assistants rescued a fugitive from the officers of the law and sent him to Canada, openly proclaiming and justifying the act, no attempt was made to punish the offenders.