Original Colonel Parker letter dated December 7, 1955. This was probably the 2nd letter because it starts in mid-sentence. It mentions the Rialto Theater in Louisville, Ky where they were to report backstage prior to 5 PM, December 8, 1955. Elvis played there along with Hank Snow, The Carter Family.
Early Rock and Roll here with the original letter (watermark shown through the paper) is scarce and hard to find!