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+,*> 7 . _ bd _ - - oo _ ; e Phe Bureau knows of no way the age of @ document. can be de- . a by: photographing the: eurface ef & questioned document and: con 7 0 pard ie Photograph. with another photograph of paper Specimen where. _ the age of: £ the papers~ 4g definitely known. -Photegraphing is . mes reserved. to when mechanical - dmpreasiong ‘appear on beth. the - questi ned and known. specimens, showing that they came from the seme 80 at: apprexinately the game tiie. No such mechanical. impressions We auhibite mumber 5 (Q69), number 9. (022), 3 aumber’ 7 when ‘ hey w werd wmaningd: in the Mabersh ory . “eit pi ‘ete sulphate : ¢ arved in an ink Bpe 3» ane the proof toverd 1 showing the ink spot was old rather ¢ an that it was of | in. Zt ig. mere tha’ the writing in Bad "No. 9 Ts B, McDonald Nota tam Ye exhi 2. Any ‘other ink. mark fz 12 been placed there either accidentally ie laced his signature. oa the 8 Réns The (a : r 9 (G22), number 47 ea esate and definite | | i { tig. ‘The Laboratory ig of the chat “the ag6 ‘of the documents mano’ be Seterntinads, faa Ga en oe 403222 Page tro, a SE eo ee eee ges