New York, Sept. 18.
The investigation of the origin of the Wall Street explosion is being ceaselessly pursued by agents of the Department of Justice. These officials believe that the explosion was causd by a time bomb, placed by the same band of anareliists 25 were implicated in the mail bomb plots of June, 1919.
Secret Service Chief Flynn declares that he is positive that a bomb caused the explosion, adding that important developments in the last two hours have convinced him that the bomb was placed by persons who were within four blocks' call of Bradstreet's when the explosion occurred.
Six powder experts have given it as their opinion that the explosive was encased in a vehicle of old time design. The possibility of identi-
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