c8 PRISONERS IN THE SOUDAN. have worked hard and made many new and inter esting notes; I have put together a vocabulary, and have tried generally to be as useful as possible. Your suggestion that I should make an ethnological chart is never out of my mind, and with reference to the work I have already begun to collect some examples of the dialects.” At a later date he wrote to Dr. Schweinfurth : —“Thanks to the many newspapers and pamphlets which have reached me by way of Uganda, I have now an ample stock of paper, and shall be able to resume the preparation of the herbarium which I promised you.” In another letter to Dr. Felkin, he writes :—“ I have not forgotten Professor Flower; according to his desire I have collected several human skulls, also some skulls of chimpanzees, and some skeletons of animals and Akka; . . . I have likewise a collec tion of shells from Lake Albert. Such for three years, amidst incessant care and anxiety, was the life of the three Europeans who were fated thus to be brought together and blockaded on the Upper Nile. When the attacks of the Arabs had ceased, and the revolts of the natives had been suppressed, they