Note 4 — LETTER III.
Joanna B. Horner translation
The journal of this expedition up the Nile has been since published under the title Expedition zur Entdeckung der Quellen des Weissen Nil, 1840-1841. By Ferd. Werne. With a Preface by Karl Ritter. A map and a table of figures. Berlin: G. Reimer 1848. 8vo.