Show bombing scheme alerts new york for explosions crank threatens to explode dynamite charges in city at rush hour NEW YORK A scrawled plan for destroying communications in manhattan by means of more than rush hour bomb explosions put strategic parts of the borough under heavy guard for three hours the plan was believed to be the th e work of a crank when it was found by postal employed emp loyes but it was suf detailed to cause the police to take no chances patrolmen detectives special ests of the bomb squad and of the tire fire department bureau of corn com busti bles swarmed into grand cen aral and pennsylvania terminals times square the general post of fice on ath avenue and subway tube and terry terminals and sta eions eleven police emergency squads stood by fireboats were alerted and seven police launches inspected the abutments of bridges and in some instances followed fer as a safeguard besides the rail terminals times square and the post office places specifically marked for explosions included the subway tubes lead ng to brooklyn the hudson and man hattan tubes to new jersey and the battery terminal of the staten island ferry in the case of the last objective the plan envisaged de st ruction of three ferryboats by means of trucks loaded with high explosives consists of 0 five sheets contained in a plain and unstamped e envelope n v e I 1 0 p e the plan consisted of five sheets of aimed paper apparently from a loose leaf notebook each sheet bore a heading giving the number of the plan and continuing I 1 five to five fifteen D day vodka 3 3 48 each sheet carried a diagram or sketch of the area affected plan no 1 began with a dia gram of the post office the text read twenty five men and women aboard train one hour before train is due in suitcases with new high explosive bombs leave suitcases on platform mingle with crowd and vanish meet at plan no 2 plan no 2 relating to time times square read fifty men and women in crowd hush rush hour leave suitcases of high explosives on platform vanish surprise element is decisive fac tor plan no 3 with diagrams ot of grand central terminal read some as pennsylvania railroad plan no 4 showed a diagram of the battery area around the barge office including the slip of the st george staten island terry ferry with three ferries shown near by after the heading the plan read rush hour twenty seven trucks load in new york side st george ferry drivers drive truck on terry ferry vanish without attracting atten tion blows up in water and s sinks inks without evidence A diagram of the brooklyn man hattan subway tubes accompanied plan no 5 the text read ten people in three group groups enter with explosives get off at south ferry this was taken to mean that the explosives were to be dropped in the tunnels A note added same plan tor for H M tubes |