New Haven Daily Herald

From Havana.—The U. S. schr. Phænix, at Norfolk, brings intelligence from Havana to the 29th ult.

Every thing is now quiet in Cuba. There are above one thousand persons confined in the different prisons under convictions or suspicions, of having been engaged in the late attempt at Revolution, among the negroes. Every free black in the Island is said to have been engaged in the plot. A vast number, no one seems to know how many, have been shot. There were several white men charged with being in some way concerned: among them two Americans, who will most probably be shot soon.

We learn that one of the plans of the negroes was to have destroyed the entire garrison of the Island, (25,000 men) by putting poison in the bread, which is baked for them daily. The poison was found in the Bake House.

In consequence of the drought the crops of the Island are very much injured. One gentleman, who cultivates a very large coffee plantation, told the U.S. Consul, that his entire crop was destroyed, not a blossom having matured. Every orange and lemon tree in the Island are said to have been destroyed by a small worm. Not an orange or lemon could be procured at Havana. There were no cases of yellow fever up to the time of the sailing of the Phoenix.

General O'Donnel has positively refused the British Commissioners to liberate any of the 'Emancipados,' or negroes captured long ago by British cruisers, and who, having served their probationary term, are entitled to their free papers, under the treaty with Great Britain. O'Donnell says the state of their 'moral and religious' instruction has been hitherto neglected, so that they are unfit for the enjoyment of freedom, and must remain until they are so fitted. This answer was given to the Commissioners respecting some 150 or more, now getting their moral instruction, working upon the Guines Rail Road, which must there be well attended to. But the truth is, these unfortunate Emancipados' are hunted up as their probationary terms of service expire, and are re-assigned to the same master, or the highest bidder, upon payment of $150 per man, and $35 per woman, for a new term of five or seven years.

There are upward of 5000 of these unfortunate people, all of them entitled to their freedom, upon the faith of the British government.