P109 CEEFAX 109 Sun 3 Apr 20:37/44       Thousands of people have taken part in a series of republican marches and parades to mark the anniversary of the 1916 Easter uprising. In Belfast and elsewhere, the police and army kept a close eye on the processions but there was no violence at any of the events. The only incident was the discovery of a bomb in Londonderry near the cemetery where a ceremony was held. It was diffused safely. Tomorrow, thousands of Protestants will bj holding their parades. News index 102/202 Newsreel 119/219