- Piering, lost their lives (1895), the important German expedition under C. Lauterbach (1896), and the various explorations carried out by or at the instigation of Sir William MacGregor, including a crossing of the island from the mouth of the Mambare river to that of the Vanapa, and a second crossing in the reverse direction (1897).
- Lauterbach, Jew.
- Lauterbach, ib., p. 614; W.
- Gleichnisse Jesu (Leipzig, 1904); Lauterbach, Jew.
- Lauterbach, " Mishnah," and W.