On reaching Louisville we were comfortably established in a large handsome hotel. As there was still daylight, we took a walk through the principal streets, and found ourselves, as usual, in a bookseller's shop; for not only are these favourite lounges of papa's, but we generally find the booksellers intelligent and civil people, from whom we can learn what is best worth seeing in the town. The one at Louisville lauded very much the pork packing establishments in this town, and said those at Chicago, and even those of Cincinnati, are not to be compared with them; but without better statistics we must leave this question undecided, for papa saw quite enough at Chicago to deter him from wishing to go through the same sight at Louisville; we, however, availed ourselves of the address he gave us of the largest slave-dealer, and went to-day to see a slave-pen. We have lately been reading a most harrowing work, called the "Autobiography of a Female Slave," whose experience was entirely confined to Kentucky--indeed, to Louisville and the adjoining country within a few miles of the Ohio. She describes Kentucky as offering the worst specimen of a slave's life, and gives a horrid account of the barbarity of the masters, and of the almost diabolical character of the slave-dealers, and of those who hold subordinate situations under them. We were hardly prepared, therefore, on reaching this pen to be received, in the absence of the master, by a good-looking coloured housekeeper, with a face as full of kindness and benevolence as one could wish to see, but "the pen" had yesterday been cleared out, with the exception of one woman with her six little children, the youngest only a year old, and two young brothers, neither of whom the dealer had sold, as he had been unable to find a purchaser who would take them without separating them, and he was determined not to sell them till he could. In the case both of the woman and of the two boys, their sale to the dealer had been caused by the bankruptcy of the owner. The woman had a husband, but having a different master, he retained his place, and his master promised that when his wife got a new home he would send him to join her.