Steam Trip to the North of Baghdad, in April 1846, with Notes on Various Objects of Interest en Route : Journey for the Purpose of Determining the Tract of the Ancient Nahrwan Canal, Undertaken in April, 1848, with a Glance at the Past History of the Territory of the Nahrwan : Journey to the Frontier of Turkey and Persia, Through a Part of Kurdistan : Researches in the Vicinity of the Median Wall of Xenophon, and Along the Old Course of the River Tigris and Discovery of the Site of the Ancient Opis : Memoir on the Province of Baghdad : Notes on the Topography of Nineveh, and the Other Cities of Assyria, and on the General Geography of the Country Between the Tigris and the Upper Zab, Founded Upon a Trigonometrical Survey Made in the Year 1852