The Birmingham age-herald., 1912-02-19
PREPARING THREE KINDS OF EVIDENCE All Will Be COrrOborated By
 Witnesses M'MANIGAL IS BASE Confession of Dynamiter Will Be Made Basis of Prosecution-John
 W. Erwin Under Arrest
 in Chicago

Indianapolis, February ls.-rhree kinds of evidence, it Nwas learned te- day, are being prepared by the gov ernment for its prosecution of the 40 men indicted in the alleged dynamite conspiracy.
 It was stated by District Attorney Charles w. Miller that all this evil dence is to be corroborated by wit nesses whose names are already known and the evidence chiefly is:
 The Evidence
 About 10000 letters and teegrams taken from the headquarters here of the International Association of Bridge and Structural Iron Workers, accord ing to charges in the indictments, show that President Frank NJ Ryan, Secre- tary-Treasurer Herbert s. Hoc<n and executive board members corresponded for six years with business agents of local unions about "jobs" to be blown up.
 Stenographic records of a telephonic | apparatus, which the government con- nected with Ryans headquarters for more than three months and through which IL is asserted conversations of the iron workers officials about the | dynamite conspiracy were overheard and transcribed.
 | Ortie F. McManigais confirmation covering his experiences as dyna- miter, employed by ]. J. McNamara | from June 190i 10 his arrest last April.
 McManigal the Base 'McManigal's confession probably will be the basis of the prosecution ! said District Attorney Miller. Tt has been corroborated in every detail es- .iD1l Ia he asserts assisted him In the trans portation of nitro glycerin and dyna- mite. Hotel clerks. railroad men and wagon drivers from all over the coun try have verified his statements as to when and where he was In connection with particular explosions. About 300 of these witnesses were before the fed eral grand jury and undoubtedly more than that number will be called at the trials.
 "I dislike 10 comment on the govern ment' s sstelephonic apparatus, which was installed in Ryan's office on night last October and by which two govern ment stenographers in room below were able to record just what was said in the iron workers headquarters, but ! will say the sppara tus worked satis- fsctorilN and ue ifaye{c great phund 1. aaee ofuetss kslSen iy thai means allich undoubtedly will be offered as ieNluenCe.
 McManigal in May McManigal now in Los Angeles. Cal will not be arraigned with the other defendants on March P. but will be brought here during the trials, probably in May II Is not stated when Me Manlgal will be arraigned
 The arrest of J w. Erwin in Chicago today puts the government into posses sion of all but two of the 5l men in- dicted. The defendants who had not been apprehended are John ]. McCray. for merly an iron worker al Wheeling W. Va, and Patrick Ryan, formerly a bus mess agent in Chicago
 Irwin Is named in his indictment as having been recording secretary and treasurer of a local union at Peoria. Ill.,, in 1908 and 1909. MeManigal confessed he blew up several places in and near Peoria after that time. One of these was an explosion in September. 19lo, when six buildings were damaged and q night watchman was injured.