[Cboldt]

-- I found it, but not sure I understand what it means. --

Not sure what it means in context of Q-drop, but letter predates laugnch of sputnik, October 4, 1957, by a little more than a year and a half.

[Disestablishmentarian]

>>letter predates launch of sputnik, October 4, 1957, by a little more than a year and a half.<<

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Great catch!