French Levant. (Netherlands). 1829. Stamp-less envelope written from Constantinople dated '25th Avril 1829' addressed to Belgium with hand-struck 'Turquie' and Constantinople circular Purifiee (disinfection) cachet on reverse with disinfection holes, rated '11, erased and charged '95' in black ink with red crayon '20' on face, routed via Germany with 'Duitschland/ over Verviers' in red on reverse (Van der Linden 1007) and Verviers transit '21st May'. Very nice item of disinfection mail.