Pistol

According to the Old English Dictionary:

es;

pistol

m. An epistle, letter :-- Be ðam spræc se pistol æt ðyssere mæssan, Homl. Th. ii. 330, 13. Ðone pistol ðe Hieronimus sette be forþsíðe Marian, 438, 3. Se apostol Iacob áwrít on his pistole, Boutr. Scrd. 22, 47. Iacob se rihtwísa áwrát ánne pistol, Ælfc. T. Grn. 14, 9, 13. Petrus áwrát twegen pistolas, 14, 7, 12, 16, 19. [Icel. pistil. From Latin.] pistol