His journal writing began in Constantinople, taking notes on buildings, markets, customs and culture, and in 1640 it was extended with accounts of his travels beyond the confines of the city. The collected notes of his travels form a ten-volume work called the "Seyahatname" ("Travelogue"). Departing from the Ottoman literary convention of the time, he wrote in a mixture of vernacular and high Turkish, with the effect that the Seyahatname has remained a popular and accessible reference work about life in the Ottoman Empire in the 17th century, including two chapters on musical instruments.