In 1794 Dallaway travelled overland to Constantinople in company with Robert Liston and his entourage; he had been appointed chaplain to Liston’s embassy to the Porte. Other members of the party were the botanist John Sibthorp, author of the Flora Graeca, and the painter Gaetano Mercati. Dallaway, who spent about 18 months in Constantinople, travelled fairly extensively while he was in Turkey and he undertook the journey to the Troad with Mercati and J. B. S. Morritt. Mercati contributed illustrations to both Dallaway’s and Morritt’s publications on Troy. He also was the first editor of the works and letters of Lady Mary Wortley Montagu.
Constantinople Ancient and Modern, with Excursions to the Shores and Islands of the Archipelago and to the Troad. By James Dallaway, M.B. F.S.A. late Chaplain and Physician of The British Embassy To The Porte. London, Printed by T. Bensley, for T.Cadell Jun.r & W.Davies,in the Strand. 1797.