The steamer halted at intervals to take in wood, which is invariably used, instead of coal as in England. This is piled in parrallelograms on the banks--the logs being split longitudinally. This forms a source of good profit, and is, in many instances, the chief maintenance of the squalid settlers of these plague-stricken and unwholesome places. After the measurement of the pile by the mate or captain, the deck-passengers and boat-hands stow it away in the vicinity of the furnaces--it being part of the terms of passage, that the lower order of passengers shall assist in the operation. This is much disliked by the latter, and many of the Germans of this class on board, endeavoured to escape the laborious duty by hiding amongst the packages on deck. A general search was, however, instituted by the officers of the vessel, just before it stopped at a wooding-station--and the skulkers were brought out, amidst the clamorous jeers of their fellows. The class of passengers I have just referred to, consisted chiefly of Germans and Irish, who, although there is no professed distinction, bargain for a deck-passage, the charge being better suited to their means. Amongst the objects that arrested my attention, as our vessel floated majestically down the turbid current, were gibbets standing on the banks, depending from several of which were short chains, doubtless required occasionally in carrying out this kind of discipline. As the horrifying objects occurred at intervals of a few miles, I at first imagined they were cranes used to lower bales of cotton into the holds of vessels, and addressing a passenger whose physiognomy prepossessed me in his favour, and who had several times shown a disposition to impart the knowledge he possessed concerning the objects around, he soon convinced me of my mistake, adding, that such engines were as necessary to the proper discipline of the negroes in that latitude as the overseer himself. He then proceeded to detail several instances of fugitive negroes being dragged in capture to the foot of the gallows, where, with halter-encircled necks, they were made not only to acknowledge the error committed and expose accessories, but "pumped dry," as he facetiously termed it, as to the intended flight of other negroes on the estate. Sometimes, he said, it was necessary to suspend the culprit for a moment or so, to intimidate, but this was only in cases where the victim (he used the word rascal) was inclined to be sullen, and refused readily to give the required information. I inquired whether it ever occurred that actual execution took place; to this my new acquaintance replied, "Wall, yes, where the nigger had dar'd to strike a white man;" but that it was usual to go to a magistrate first, in such cases. The appearance of these gibbets, after the information I had received respecting them from my slave-holding acquaintance, made my flesh creep as we steamed onwards, the more so as, in many of the grounds skirting the river, where these sombre murky-looking objects presented themselves to the gaze of the traveller, gangs of negroes were at work, looking up complacently for a moment as the vessel glided by. I was subsequently told by a gentleman who had been long resident in the state of Louisiana, that no punishment so effectually strikes with terror the negro mind, as that of hanging, the very threat being sufficient to subdue (in general) the most hardened offenders. This I do not wonder at, for perhaps there are few field-hands living in the south but have, at some time or other, witnessed the barbarities used at a negro execution, sudden death by pistol or bowie knife being far preferable to the brutal sneers and indignities heaped upon the victim by the cowardly assassins who superintend such operations.