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- Sobel2 failed to repert for work after June 16, 1950. The oonpany a _ aduitted recetuing letters from Sobel with tnatructions to for- pevetved a letter from Sobell oa or about July 3, 1950, wheretn - Jeaving La Guardia Field at 9:45 pome,y Fastern Standard Tine on LI Mi ¥ S038 4 check at the Reeves Inatrunent Company reflected that Sodell advteed that Ae needed a rest aad was gotng to take a feo weeks off to recuperate. — A Betghborhood trueatigation by the FBI developed that a Sobell, his wife and their twe children were last seen at their hone on June 22, 1950, and that they had left hurrtedly without advising anyone of thetr {ntended departures . - Through Anertcon dtrlinesa, La Guardta Fleld, tt was deternined that Sobell, hia wife, Helen, his stepdaughter, Sydney, aad hts oon, Mork, had departed for Mexico City on flight Hoe 157, June 28, 1950. It was further deternined that round-trip ezcurston ttokets for traneportatton from Feu York Ctty to Meztco and return were purchased on June 21, 1950, tn the name of Morton Sobell. Further investigation ef Sobell's flight to Mexico reflected that Sobell had comauatcated througak the actls with relatives through the utilization of one Filltan Danstger of Hew York City a@ a nat! crop. Danstger vos intervieved aad reluctantly . word these letters to Sobell's relatives. Tate aduteston was wade by Denziger after he was advised that the FBI Laboratory