One member of the intelligence community who had not fallen foul of the Stalin purges was Elena Stasova , with whom Daniel had worked at the IRH in the 1920s . Joseph Stalin died in March 1953 , and in October 1953 Daniel wrote a letter to Stasova which the latter received , even though it was simply addressed to " Elena Stasova , Moscow city " . It appears that it was as a result of their ensuing communication that on 28 January 1957 Richard Daniel was posthumously rehabilitated by the appropriate Moscow military tribunal . A couple of months later , on 26 March 1957 , Berta Daniel , still very much alive , was rehabilitated by the same Moscow tribunal
the Stalin purges
Great Purge
Berta Daniel