Pine Bluff daily graphic., 1920-09-17

S~-~~~>o~~~>~~ of which were broken, requested as. sistance of the military authorities at Governors Island and company of soldiers was sent to guard the 
 Establish Dressing Stations.
 Hurry calls were also sent to all hospitals in the downtown section of New York and scores of ambulances were soon speeding through the mar row streets. Dressing stations were established in the Hobbies of build ings nearby where the less seriously injured were given treatment.
 Evidence tending to confirm the theory that the explosion was caused by bomb or some other internal machine came from several sources
 Chief Police Inspector Lahey ported late today that he had found evidence to justify the conclusion that the explosion was caused by a huge bomb loaded with T. N. T. trinitrotoluol--r -inforced with iron slugs fashioned from window weight bars. Pieces of these slugs were found in several adjacent structures This type of weight bars, a close inspection by police and department of justice agents disclosed, is not used in any building within a radius of several hundred feet from the scene of the explosion.
 Warning that radicals planned a renewal of bombing outrages were sent less than month ago to all eastern clients of the William J Burns detective agency, according to a statement by MT. Burns who said he was convinced that today's ex- plosion was a premeditated attack and was not accidental
 MT. Burns, who said he had been engaged by the Morgan firm to make an investigation of the accident stated that his personal investiga- tion convinced him that wagon containing bomb or bombs, was left in front of the sub-treasury building with timing device so fix ed as to cause it to explode pre- cisely at noon. No trace of the driver of the wagon has been found he said, and added that in his opin- ion the man escaped few moments before the explosion occurred.
 Fire Chief Kenlon and officers of the bureau of combustibles also ex- pressed the belief that the explosion was caused by a bomb after exam ming fragments of metal found in the street in front of the Morgan off, fees. Dr. William F. Doyle, chief of the bureau of combustibles, point ed out that the small hole found in the street near the Morgan offices and the widely scattered scars or the facades of nearby buildings also indicated that the blast was caused by bomb rather than in an explos- ion of quantity of dynamite o1 other explosives.
 Letter Dropped
 ! A letter giving warning of today's explosion was dropped Wednesday morning through the mail slot of 6 door in one of the offices of the
 
 French high commission at 65 Broad way, it became known tonight. This letter, apparently written by a man formerly in the employ of the com mission, was torn into small pieces soon after it was read and dropped into a waste basket.
 Today, after the explosion, these bits of papers were taken from the basket, pasted together and turned over to the police. The letter which was addressed to Lieut.. Arm aud, who is attached to the commis- sicn, began with the words: Greet ings.'' The writer said he thought he was rendering a service to the French commission by advising Mau- rice Casenave, minister plenipOten- tiary, and his assistants, of the fact that a catastrophe would occur in Wall street about 2:S0 o'clock. Nc date was mentioned.
 The writer suggested that Lieut. Arnaud advise Minister Casenave to have the offices of the commission closed and unoccunied at 2 o'clock