Weekly National Intelligencer

LATE FROM HAVANA.
CORRESPONDENCE OF THE JOURNAL OF COMMERCE.
Havana, May 1, 1851.
You have been advised of the conviction before a military tribunal of Graciliano Montes de Oca, of attempting to prevail on certain pilots to leave the island and enter the service of Lopez and his confederates. He was executed by the garote on Tuesday, and it is announced in the Gaceta (official paper) that he confessed the charge in open court. This is the first execution for "high treason" within my memory, extending back to my first residence here in 1826. It has caused some sensation, but the same fate would probably have attended the culprit in any country during a state of war, and the Government here considers itself at war with the Filibusteros!
To-day the Falcon, from New Orleans, brings fresh reports of the outfitting of an expedition; and I am told, although I have not seen it, a proclamation of President Fillmore denouncing all concerned, &c. I can but add my firm conviction that the invaders must be indeed strong in numbers and means to expect any success; or the inhabitants, partly through loyalty, and partly through fear of the consequent anarchy, or of the terrible vengeance of the Government in case of defeat, will be but slow to afford them "aid and comfort." The vigilance of the Government continues unceasing. The number of military in the city is much reduced, by transfers to the interior and posts on the coast. The official paper contains copies of several offers of service from individuals and bodies of men in the interior, in the event of invasion, &c. But, in the midst of all these exciting rumors, the barometer of tranquillity, the rate of exchange, fails to confirm their validity. To-day bills on New York are at 5 to 5½ discount!