Did you not make these statements in 1994 ?........
An obvious move would be to contact Walter M. Allen, and a
simple expedient would be to look in the phone book. A
Walter M. Allen was listed in the Pittsburgh directory as
late as 1991, but the number has since been reassigned. A
letter to the address came back with `Forwarding Expired'
stamped on it. Sitchin named his informant at about the
same time his informant became incommunicado. I think it's
likely that Walter M. Allen is no longer alive.
You had Allen dead by 1994. How then did you exchange letters ?
Even Google can't reach that far.