Again Peter returned to Philadelphia, and was now willing to accept the offer of Concklin. Ere long, the opportunity of an interview was had, and Peter gave Seth a very full description of the country and of his family, and made known to him, that he had very carefully gone over with his wife and children the matter of their freedom. This interview interested Concklin most deeply. If his own wife and children had been in bondage, scarcely could he have manifested greater sympathy for them. For the hazardous work before him he was at once prepared to make a start. True he had two sisters in Philadelphia for whom he had always cherished the warmest affection, but he conferred not with them on this momentous mission. For full well did he know that it was not in human nature for them to acquiesce in this perilous undertaking, though one of these sisters, Mrs. Supplee, was a most faithful abolitionist. Having once laid his hand to the plough he was not the man to look back,--not even to bid his sisters good-bye, but he actually left them as though he expected to be home to his dinner as usual. What had become of him during those many weeks of his perilous labors in Alabama to rescue this family was to none a greater mystery than to his sisters. On leaving home he simply took two or three small articles in the way of apparel with one hundred dollars to defray his expenses for a time; this sum he considered ample to start with. Of course he had very safely concealed about him Vina's cape and one or two other articles which he was to use for his identification in meeting her and the children on the plantation. His first thought was, on reaching his destination, after becoming acquainted with the family, being familiar with Southern manners, to have them all prepared at a given hour for the starting of the steamboat for Cincinnati, and to join him at the wharf, when he would boldly assume the part of a slaveholder, and the family naturally that of slaves, and in this way he hoped to reach Cincinnati direct, before their owner had fairly discovered their escape. But alas for Southern irregularity, two or three days' delay after being advertised to start, was no uncommon circumstance with steamers; hence this plan was abandoned. What this heroic man endured from severe struggles and unyielding exertions, in traveling thousands of miles on water and on foot, hungry and fatigued, rowing his living freight for seven days and seven nights in a skiff, is hardly to be paralleled in the annals of the Underground Rail Road. The following interesting letters penned by the hand of Concklin convey minutely his last struggles and characteristically represent the singleness of heart which impelled him to sacrifice his life for the slave-- EASTPORT, MISS., FEB. 3, 1851.