twelve o'clock
`` Tuesday , the day set for the revolution , came around according to schedule . O'Connor said that a signal had been agreed upon for the uprising . There was an old cannon on the beach near the national warehouse . That had been secretly loaded and promptly at twelve o'clock was to be fired off . Immediately the revolutionists would seize their concealed arms , attack the comandante 's troops in the cuartel , and capture the custom-house and all government property and supplies . `` I was nervous all the morning . And about eleven o'clock O'Connor became infused with the excitement and martial spirit of murder .