On the evening of the third, an event happened at Dartmoor, which ended in a very serious manner. A dispute arose between two of the prisoners late belonging to the United States’ brig Argus, by the names of Thomas Hill and James Henry; the quarrel growing quite warm, and not being ended that night, they agreed to fight next morning; accordingly, next morning, about nine o’clock, they commenced the battle in prison No. 4, and by an unfortunate blow from Hill, Henry was killed on the spot; a jury of inquest was called next morning and held over the body of the deceased, and after hearing the evidence, the jury brought in a verdict of manslaughter, (or a killing not wholly without fault, but without malice.) Thomas Hill was removed and confined in the county prison at Exeter, there to await his trial at the August assizes then next ensuing. The fourth of July now having arrived, and all things in great preparation, we displayed our flag in the yard, with the following inscription upon it in large capitals, “_All Canada or Dartmoor prison for life_.” This pleased the soldiers, but irritated the officers, who, discovering our firm resolution to defend the flag, and not having but part of a regiment in the garrison, and they friendly toward us, thought best to be quite silent, and let us proceed our own way; for if they attempted to deprive us of the flag, we might rush on the guard, who would make but a faint resistance, or join us, and all the prisoners might make an easy escape. But the prisoners did not wish to make the attempt, for they knew a reinforcement could easily be raised, and make a vigorous pursuit, and were therefore willing to wait some more favorable opportunity. At eleven o’clock all the prisoners assembled in the yard. The British officers belonging to the garrison, colonels, majors, captains, clerks, turnkeys, and a great number of soldiers, assembled on the walls to hear an oration composed by a Yankee sailor, upon the circumstances of the present times. An empty cask was placed in such a situation, as all the strangers on the walls could hear distinctly. The orator of the day then mounted the cask, and all the spectators keeping a profound silence, began his oration, which we shall give our readers verbatim, as it was delivered by the sailor. _Countrymen and fellow-citizens_: This day we dedicate as the birth-day of freedom, it being the fourth of July--the day that our fathers declared themselves free and independent from the tyrannical laws of this country. After many years hard struggle, and the loss of many of our fathers and friends, America was acknowledged by all civilized nations, a free and independent government.