Cape Haytien-Haiti.

Since I last had the pleasure, in the month of January, Haiti was reposing in the sweet sleep of confidence and tranquility, and we all looked forward to a season of renewed life and prosperity in her affairs.

This was but a deceitful calm only to burst forth into a more terrible revolution and bloody warfare.

The Spaniards who occupy the eastern and most valuable part of the island, and who have never been well affected to the black government of this part, which was in some measure forced upon them, suddenly showed a manifest of their grievances and flew to arms on the 7th of March, declaring themselves a free and independent state, divided and separate forever from the Haitien Republic—the semi-black chickens from the black ones.

The President, Herard, immediately proceeded to arms the whole male population of the French part of the island, and marched with a large force to overrun the Spanish part with his forces at one blow. The Spanish population do not number one-third of the French.

The forces of Pierot on the side of the north, soon mustered 30,000 men, with which he set out for St. Domingo. His first resistance from the enemy was at Azua, a small town of about 600 inhabitants, where it is said our regiments of the advanced guard were cut to pieces; however, coming up with the main body, the main body of the army, he forced the Spaniards to retire, and ultimately retreated the town, which he found totally abandoned, without a single soul in it. The loss on both sides is variously stated at 100 to 1,000 men, and by our last accounts from Port au Prince, the President was still at Azua, waiting and calling for further reinforcements. He had only removed the dead bodies from the streets of Azua, where the stench from the dead bodies, which it appears were not buried.

On this, the north side of the island, General Pierot advanced on the frontiers of the north, with ten thousand men. In the mean time, the Spanish General, Salcedo, having marched from Santiago, advanced to within eight miles of the Haytien forces, where he remained some days in suspense. He ultimately sent two officers, escorted by four dragoons, with a flag of truce, to Gen. Pierot, as bearers of a letter, communicating that the object of his mission was not hostilities, but merely to occupy the frontiers of the Dominican Republic. To this flag of truce Gen. Pierot paid no respect, but immediately had the officers and men seized, stripped of their arms and horses, and these, together with their horses, he distributed among his own officers. He then sent the officers to a safe place, where the six individuals are at present confined in a small room, and all possibility of communication with them prohibited. So much for respect to a flag of truce.

The Spaniards after this, in order to entice Gen. Pierot further into the interior, gradually retired before him, as soon as he set out from Daxabon on the 24th of March, and on his march he put to the sword all the National Guards and troops of the line that fell into his hands, leaving behind him nothing but women and children.

The Spaniards in their movement of retiring without any sacrifice of life, drew them to the cross of the roads of Santiago, on the 29th of March, for a combined attack upon the city of Santiago.

General Salcedo, however, in the face of his enemies, despatched another flag of truce to Gen. Pierot, to inform him that the city of St. Domingo was surrounded and fired upon; several were killed and wounded on both sides. This was the first opening of the campaign on the part of the Haytiens, and where Spanish blood first watered the soil of their country.

Gen. Pierot reached the neighborhood of Santiago on the 29th of March, and made his dispositions for attacking the Spaniards, who had assembled a force of about five thousand men, advantageously posted on a rising ground in the outskirts of the town.

The Haytien army was divided into three divisions; the right, commanded by General Cadet Antoine, was ordered to cross the river Yaqui, and the river Yaqui in the rear of Quinones' brickery, and to attack the Spanish in the flank. Gen. St. Louis, commanded the left division, to cross the river at Paso Colorado; and Gen. Pierot, the centre division, to cross at Paso Yaqui. The whole was done with much skill and precision, and the three columns almost simultaneously advanced to the attack, about three on Saturday the 30th of March. The Spaniards very quietly allowed them to come close up, when they suddenly poured out such showers of grape and musketry as to cause confusion in the Haytien ranks; however, they rallied, and three different times returned with coolness to the assault, but the Spaniards kept up such a fire that, finding it in vain, Gen. Pierot was finally forced to retreat, after suffering great loss. His army is now completely broken up; for it is reported by the wounded and stragglers who are coming in, that he has scarcely one thousand men together.

The Spaniards never left their lines during the engagement, and are supposed to have suffered little or no loss. After the action, Gen. Pierot found it necessary to send a flag of truce to the Spaniards, the result of which has not transpired—though we know they were well treated, notwithstanding Pierot's treatment of theirs.

There is no doubt that the other division in the interior must be the same; and, from the liberal and enlightened policy proclaimed by them, it is thought the existence of the Spanish part will soon become powerful and wealthy.