CUBA.
The colonial government of Cuba has discovered new and formidable conspiracies against the Spanish authority in that island, and has made numerous arrests of suspected parties. During the months of June and July several numbers were clandestinely published and widely circulated, of a paper called The Voice of the People, the object of which was to arouse the Cubans to resistance of the Spanish rule. For some time the efforts of the authorities to detect its editors, or the place of its publication, were ineffectual: but both were finally betrayed by parties who had become acquainted with them. The principal editor, however, had previously escaped to the United States. Nearly all engaged upon it, so far as known, were either native Cubans or Spaniards. The cholera was very prevalent and destructive at Havana, at our latest dates.