Entire letter canc. "ΠΥΡΑΙΕΥΣ*15.ΔΕΚΕΜ.1854" and boxed "Π.Ε.Δ." in red, arr. "ΣΥΡΟΣ*16.ΔΕΚΕΜ.1854", postage "30" (lepta). Cachet "Π.Ε.Δ." was used for postage to be paid to foreign post offices or/and maritime companies. This letter was carried by Austrian steamer (weekly itenerary Piraues - Syros).