Three topics are discussed in this article, all connected to the printing work done by Sylvester, the Patriarch of the Greek Orthodox Church of Antioch (1724-1766), who travelled to Moldavia and Wallachia and succeeded in obtaining liturgical and polemical books necessary to the Arab Christians of Ottoman Syria and neighbouring provinces: first, the letters of Mūsā Ṭrābulsī, the Patriarch’s secretary, which enclose information on the Arabic printing activities of Iași and Bucharest; second, the description of a rare copy of a Psalter printed in Beirut in 1752, recently located in Uppsala; and third, information on an unknown Arabic Akathist, printed in a yet unidentified press, but possibly by Patriarch Sylvester’s apprentices.