USBN #220 June 1949 p2
". . .in connection with the dome of the Temple, he would like to point out that a metal dome, constituting a partition between the inside and outside light of the Temple, would have entirely done away with the original concept of the light of heaven coming into, and the interior illumination, at night, going out of, the Temple. The transparency, the "openness" would have been done away with, no matter how much perforation remained, and thus the original idea have been lost."
to the NSA, written through his secretary, dated April 11, 1949.