Part 21 of a series reassessing the documentary record behind the 1933 Magenta narrative. TL;DR Sign investigated UFO reports and considered interplanetary explanations; McCoy’s March 1948 briefing wished for a recoverable crash. Sneider’s Chiles–Whitted analysis left the object unidentified; its aircraft calculations described possibilities. Ruppelt and Fournet claimed to have read an interplanetary “Estimate of the Situation.” No identified copy has been located; a 2025 transfer list’s “Est...