Entire letter canc. "ΑΘΗΝΑΙ*15.ΑΠΡΙΛ".1841" to London. Inscribed "Vapeur dε Lloyd", boxed "ΔΠ" and "AT" (Autriche Transit), transit postmark "ΠΑΤΡΑΙ*17.ΑΠΡΙΛ.1841", arr. "14.MAY.1841". On reverse paid postage "180+90=270" (lepta), while on front "3/2" (kreuzer) for the Lloyd fee to be collected. Disinfection slits.