Reise in Hadhramaut, Beled Beny ‘Yssa’ und Beled el Hadschar. Herausgegeben, mit einer Einleitung, Anmerkungen und Erklärung der Inschrift von 'Obne versehen von Heinrich von Maltzan. Nebst Karte und Facsimile der Inschrift von 'Obne.

Account of the journey along the coast of Hadhramaut in 1843, first published in 1870 by Heinrich von Maltzan.
Gustav Adolph von Wrede (1807-1863) was a noted German researcher on Arabia. He was the first European to travel to Yemen and explore Hadhramaut. Von Wrede left home at the age of 16 to travel the seas and found himself in 1826 in Smyrna (now Izmir in Turkey). Wrede was an instructor in the Ottoman army, and he also participated during the Russo-Turkish war. He returned to Westphalia, north western Germany, but missed the Orient. Wrede could not find a German publisher for his travel memoirs, so he tried to have it published in English. However, the translator suddenly committed suicide and as the maps and other drawings by Wrede were in his estate and could not be found, the English edition was not completed. Embittered and deprived of all means of subsistence, Wrede emigrated. Between 1826 and 1850 he travelled and started working in Turkish and Egyptian service in the Orient and wrote his travel notes in 1843.
Maltzan (1826 - 1860), in his twenty-fifth year his health broke down, and he became a traveller. "The spell of the East grew upon him, and he had the desire to visit the centres of Mohammedan faith”.
Maltzan travelled also through Yemen and his account of that journey is rich in topographical and cartographical material.
Bibliographic references: Embacher 299; Dinse 443; Marco 2331; Henze III. 360.