Here's the next entry in the series of examples of correspondence I had with the WTS back during the 1970's (mostly). This letter concerns the establishment of the year 1918 as being the time for the "first resurrection," i.e., the resurrection to spirit life of the anointed ones who had died previous to that time.
What I find interesting about this letter is that no attempt was made to address the question I actually asked. I wanted to know why the Society insisted that the time between the beginning of Christ's invisible parousia (in 1914) and the "first resurrection" should be exactly parallel to the length of Jesus' ministry. The Society had asserted that this was the case, but had never established a reason for the parallel that I could find. In this letter, they did not even attempt to offer evidence for the parallel, but simply asserted the likelihood that the "first resurrection" had happened around that time.
Interestingly, they appeared to be backing away from the 1918 date a bit in the body of the letter. The P.S. hints strongly that "new light" might be forthcoming on the subject, and, indeed, a few months after this correspondence, the Watchtower did carry study articles on the "first resurrection." However, these articles also failed to answer my basic question, but merely reiterated the previous teaching on the subject.