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i t t normal hetwren two coleagues. When Fhugess was appointed to tw Bssegh Office, Maclean was ih Washington and at the time Burgess imself.was ap- pointed to Washington, Mac. lean was back in the ‘United Kingdom awaiting assignment to the Atmerican Hepariment. af the Foreign Offine. It is now ciear that they were in com Taunication wilh each olner atter the teturn st Burg from Washington in 1661 and they may have been in such communication earlier, Their | telations were, hawev h as fo case remark, Yn January, 1949, the security authorities “received a veport that cettain Foreign Office in formation had leaked ta the viet anthoritics come years never earlier, “The report amonnted | to a Lite more {han a hint and it was at. the time impossible to aitribute the leak to any particular jdual, Highiy aera}, but widerpresd and pro- tracted enguiriss were pegus hy the security authorities and the field of stiapicion bad been narrowed by mid-April, 195f, to two se three persnns, By ‘ihe begining af May, Maclean had | wore to he vegurded as the principal suspect. There was, however, even at that time, 26 legally admissitle evidence tf support a prosecution under the Official Seorets Acts. Arrange ments were made to ensure that information of rxeeptional se~ evecy and, importance should [pot conte into bis hands In the teantime the genunity authorities arranged te invesii- gate his activities ang coniacts in order to Incrnase their back- ground knowlege and if pos | sible to obtain information whieh could be used as evie dence in @ prosecution. On May 28 the khes Secretary ef Stato, Mr. Herbert Morriaun, sane toned a propasal that the se. ewity authoritins should ques ; tion Maciean, In veaching wis decision it nad to he berte in mind that such questioning: might produce confession or. voluntary statement from Mac- jean suiticient to support & prosecution, but might sere badd alert him and to reveal the nature“and the extent of the suspleion against hint, tivo of their three chifdren, Dona td, de, and Fergus. The . Brifish haye termed Maclean a Soviet spy and believe ke | is in Meseow, Mi Maclean and her children were Jast seer } on their way from Geneva to the Soviet comet Austria, ; Photo was taken before Maclean's disappearance in 1951, |