On the Rhinoceroses from the East-Indian-Archipelago

It seems that the distribution of the Rhinocerotidae over the islands of the Malayan Archipelago is still a puzzle to all the authors, unscientific as well as scientific ones, even to the most modern writers on the subject. This fact is the more surprising as fifty years ago the question was nearly settled and as since the year 1876 the problem in fact does not exist more at all. Sal. Müller and Herm. Schlegel said 1839—44 ¹), that in Sumatra was living Rhinoceros sumatrensis, and in Java another species Rhinoceros sondaicus; the latter perhaps also in Borneo. Beautifully executed plates illustrate their accurate and excellent descriptions. The open question thus was this: does there exist a Rhinoceros in Borneo, and if so, to what species may it belong?