NACHTIGAL (Gustav). Sahara und Soudan. Berlin, Weidmannsche buchhandlung, 1879-1881. 2 volumes in-8, German edition illustrated with black engravings and two fold-out maps in the endpapers. Publisher's full percaline, smooth spine decorated. Without the third volume, published in 1889. (inner spine of second volume cracked, some soiling, numerous handwritten annotations, tears in lining). Expert : Monsieur Nicolas Asvisio