A 2 x 1 swatch of insulation from the interior wall of Byrd’s Advance Meteorological Base, signed in black ink, “R. E. Byrd.” Swatch is attached to an 8.5 x 11 presentation sheet, bearing a printed message and signature of Byrd, dated May 10, 1936. Message reads in part: “I want to express to you my deep and enduring appreciation of the assistance you rendered our second Antarctic Expedition…attached to this sheet is an autographed piece of insulation from the wall of the Advance Meteorological Base, the southernmost habitation ever occupied by man.” Framed to an overall size of 11 x 14. Byrd’s signature somewhat faded, but still legible, and toning to sheet, otherwise fine condition. RRAuction COA.