To the preceding testimony of slaveholders, published by themselves, and vouched for by their own signatures, we subjoin the following testimony of other witnesses to the same point.

JOHN M. NELSON, Esq., a native of Virginia, now a highly respected citizen of highland county, Ohio, and member of the Presbyterian Church in Hillsborough, in a recent letter states the following:—

"In Staunton, Va., at the horse of Mr. Robert M'Dowell, a merchant of that place, I once saw a colored woman, of intelligent and dignified appearance, who appeared to be attending to the business of the house, with an iron collar around her neck, with horns or prongs extending out on either side, and up, until they met at something like a foot above her head, at which point there was a bell attached. This yoke, as they called it, I understood was to prevent her from running away, or to punish her for having done so. I had frequently seen men with iron collars, but this was the first instance that I recollect to have seen a female thus degraded."

Major HORACE NYE, an elder in the Presbyterian Church at Putnam, Muskingum county, Ohio, in a letter, dated Dec. 5, 1838, makes the following statement:—

"Mr. Wm. Armstrong, of this place, who is frequently employed by our citizens as captain and supercargo of descending boats, whose word may be relied on, has just made to me the following statement:—

"While laying at Alexandria, on Red River, Louisiana, he saw a slave brought to a blacksmith's shop and a collar of iron fastened round his neck, with two pieces rivetted to the sides, meeting some distance above his head. At the top of the arch, thus formed, was attached a large cow-bell, the motion of which, while walking the streets, made it necessary for the slave to hold his hand to one of its sides, to steady it.

"In New Orleans he saw several with iron collars, with horns attached to them. The first he saw had three prongs projecting from the collar ten or twelve inches, with the letter S on the end of each. He says iron collars are quite frequent there."

To the preceding Major Nye adds:—

"When I was about twelve years of age I lived at Marietta, in this state: I knew little of slaves, as there were few or none, at that time, in the part of Virginia opposite that place. But I remember seeing a slave who had run away from some place beyond my knowledge at that time: he had an iron collar round his neck, to which was a strap of iron rivetted to the collar, on each side, passing over the top of the head; and another strap, from the back side to the top of the first—thus inclosing the head on three sides. I looked on while the blacksmith severed the collar with a file, which, I think, took him more than an hour."

Rev. JOHN DUDLEY, Mount Morris, Michigan, resided as a teacher at the missionary station, among the Choctaws, in Mississippi, during the years 1830 and 31. In a letter just received Mr. Dudley says:—

"During the time I was on missionary ground, which was in 1830 and 31, I was frequently at the residence of the agent, who was a slaveholder.—I never knew of his treating his own slaves with cruelty; but the poor fellows who were escaping, and lodged with him when detected, found no clemency. I once saw there a fetter for 'the d——d runaways,' the weight of which can be judged by its size. It was at least three inches wide, half an inch thick, and something over a foot long. At this time I saw a poor fellow compelled to work in the field, at 'logging,' with such a galling fetter on his ankles. To prevent it from wearing his ankles, a string was tied to the centre, by which the victim suspended it when he walked, with one hand, and with the other carried his burden. Whenever he lifted, the fetter rested on his bare ankles. If he lost his balance and made a misstep, which must very often occur in lifting and rolling logs, the torture of his fetter was severe. Thus he was doomed to work while wearing the torturing iron, day after day, and at night he was confined in the runaways' jail. Some time after this, I saw the same dejected, heart-broken creature obliged to wait on the other hands, who were husking corn. The privilege of sitting with the others was too much for him to enjoy; he was made to hobble from house to barn and barn to house, to carry food and drink for the rest. He passed round the end of the house where I was sitting with the agent: he seemed to take no notice of me, but fixed his eyes on his tormentor till he passed quite by us."

Mr. ALFRED WILKINSON, member of the Baptist Church in Skeneateles, N.Y. and an assessor of that town, testifies as follows :—