Death of Mr. Calhoun.—During the pendency of these great questions which were agitating the country to its remotest ends, and the discussion of which seemed to increase rather than allay the already excited storm, an event occurred calculated to show the folly of all such sectional strife, as that in which the Representatives of the nation were engaged. This was the death of that able and distinguished statesman, John C. Calhoun, of South Carolina, who died at Washington, while a member of the Senate, on the 6th of April. Among the great men of the day, few had occupied a more commanding station than he, and but few had been longer engaged in the public service of his country. As early as 1810, Mr. Calhoun took his seat in the House of Representatives of the United States. The period was pregnant with portentous events. Europe was involved in war, nor was it improbable that the United States would long escape its calamities. Mr. Calhoun felt, and enforced the necessity of immediate preparation for such a state. The first tones of his voice in public life might be considered war-like, yet no man loved peace better, or deemed it more likely to be secured than by being well prepared for hostilities. In subsequent years, he occupied various important offices. During the administration of the younger Adams, and the first term of Gen. Jackson, he held the office of Vice President. During a part of the Tyler Administration, he was Secretary of State. For many years he had a seat in the Senate. In all these stations he showed himself to be a man of pre-eminent talents and incorruptible integrity. He was strongly southern in his feelings, and perhaps his sectional prejudices sometimes led him to the advocacy of some measures, and opposition to others, which with other feelings he would have avoided. Yet, no one could doubt his patriotism or his firmness in the cause of right, as he understood it. His speeches displayed great logical acumen, and were often characterized for great power and brilliancy, which commanded the admiration of his strongest political opponents.

In the great questions which were agitating the national representatives at the time of his death, Mr. Calhoun had taken the deepest possible interest. He was solemnly impressed with the critical juncture of affairs, and thought he foresaw in the measures which were likely to be adopted, the precursors of a shock fatal to the integrity of the National Union. Though borne down with a disease which in the sequel must prove fatal, he enlisted himself strongly—too strongly for his physical strength, to avert impending calamities, as he deemed them, and by so doing, hastened the termination of his mortal existence.

His departure was a national loss. Even those who had long differed from him in regard to political doctrines and political measures, lamented his death. A committee of the Senate accompanied his remains to his native state, where it is believed he was held in honor and affection almost unequaled in the history of public men.

The funeral obsequies of Mr. Calhoun having been solemnized, Congress resumed its deliberations, and, shortly after, a resolution introduced by Mr. Foote, referring the subject matters in debate to a select committee, consisting of thirteen, was adopted. Of this committee, Mr. Clay was chairman. To this committee were referred the following subjects upon which to report:

1st. The admission of California as she presents herself. 2d. Governments for territories without any anti-slavery proviso. 3d. Settlement of the boundary question between Texas and New Mexico, and the purchase of the territory of Texas. 4th. The ultimate admission of other states, formed from the territory of Texas. Besides these, the committee were permitted to take into consideration or not, at their discretion, the subject of fugitive slaves, and Slavery in the District of Columbia.

On the 8th of May, Mr. Clay presented the majority report of the Committee of thirteen, denominated the compromise or omnibus bill, which after a protracted discussion failed; but its provisions were subsequently passed, as we shall have occasion to notice in a subsequent page.

Invasion of Cuba.—On the 25th of April, and the 2d of May, an expedition, three hundred in number, left New Orleans, under command of Gen. Lopez, for the secret purpose of invading Cuba. This force had been collected, armed, and officered in the United States. So secretly had the affair been conducted, that neither the Spanish Consuls in our larger ports, nor the government of the United States had been apprised of it. The invaders consisted in part of old Mexican soldiers, some of whom were informed of the object in view, while not a few enlisted under the expectation that the expedition was bound to California. On the morning of the 19th of May, a landing was effected at Cardenas. A brief struggle ensued between the invaders and the troops, in which the latter were repulsed, the Governor captured, his palace plundered, and a large quantity of public money seized. The invaders had counted upon accessions to their ranks in the Spanish army, and from the disaffected inhabitants. In this, however, they were disappointed, and Lopez re-embarked on board the steamer, and with a few of his followers made his escape to the United States, leaving the great body of his adherents to the tender mercies of the authorities of Cuba. As soon as the sailing of the expedition was known, the American executive despatched armed vessels to prevent its landing in Cuba. In this, however, they failed. Lopez was arrested in New Orleans, and held for trial. It seems that a Spanish steamer captured two vessels in the Mexican waters, laden with men whom they suspected of having intended to join the invading expedition, and took them into Havanna. The release of these was peremptorily demanded by the President, and subsequently they were so released. But three, it is believed, of all who participated in the invasion, were condemned, and these three were sent to the galleys.

Convention with Great Britain.—This Convention had reference to the Nicaragua treaty, so called, which was ratified by the governments of the United States and Great Britain, and promulgated at Washington, the 4th of July, 1850. This treaty provided for the establishment of a communication between the Atlantic and Pacific Oceans, by means of a ship canal, to be constructed by way of the river San Juan de Nicaragua, and either or both of the lakes of Nicaragua or Maragua, to any port or place on the Pacific Ocean.

Death of Gen. Taylor.—The administration of Gen. Taylor was suddenly brought to a close, on the 9th of July, by his demise, on the evening of that day. His illness was brief, and occasioned by exposure and fatigue, while attending the celebration of the 4th of July. His funeral was attended by a large military display, by the officers of government and the representatives of foreign nations, and by an immense concourse of his fellow citizens.

This event was unexpected, and the more so, from the well known vigor of health always enjoyed by the President. It came upon the nation, as in the case of the death of the lamented Harrison, like the voice of an earthquake. Few could credit it; none were prepared for it. That he, who "had passed through severe military duties in the swamps of Florida, and on the plains of Mexico, unharmed by bullet or pestilence, should be struck down in the midst of his friends, and in the high station to which his country had raised him—it was thought passing strange."