"The Narrative of an Expedition to Explore the River Zaire" (London, John Murray, 1818), published by permission of the Lords Commissioners of the Admiralty, was necessarily a posthumous work. The Introduction of eighty-two pages and the General Observations (fifty-three pages) are by anonymous hands; follow Captain Tuckey's Narrative, Professor Smith's Journal, and an Appendix with seven items; 1, vocabularies of the Malemba and Embomma (Fiote or Congo) languages; 2, 3, and 4, Zoology; 5, Botany; 6, Geology; and 7, Hydrography. The most valuable is No. 5, an admirable paper entitled "Observations, Systematical and Geographical, on Professor Christian Smith's Collection of Plants from the Vicinity of the River Congo, by Robert Brown, F.R.S." The "Geology," by Mr. Charles Konig, of the British Museum, is based upon very scanty materials. The folio must not be severely criticized; had the writers lived, they might have worked up their unfinished logs into interesting and instructive matter. But evidently they had not prepared themselves for the work; no one knew the periods of rain at the equator; there was no linguist to avoid mistakes in the vocabulary; moreover, Professor Smith's notes, being kept in small and ill-formed Danish characters, caused such misprints as "poppies" for papaws. Some few of the mistakes should be noticed for the benefit of students. The expedition appears to have confused São Salvador, the capital, with St. Antonio placed seven days from the river mouth (p. 277). It calls Santo Antão (Cape Verds) "San Antonio;" the Ilha das Rôlas (of turtle doves) Rolle's Island; "morfil" bristles of the elephant's tail, and manafili ivory, both being from the Portuguese marfim; moudela for mondele or mondelle, a white man; malava, "presents," for mulavu (s. s. as msámbá, not maluvi, Douville), palm wine, which in the form mulavu m'putu (Portuguese) applies to wine and spirits. We have also "Leimba" for Lyámba or Dyámba (Cannabis saliva); "Macasso, a nut chewed by great people only," for Makazo, the bean of the Kola (Sterculia); "Hyphæa" and "Dom" for Palmyra Flabelliformis, whose "fruit hangs down in bunched clusters;" "Raphia" for Raphia Vinifera, commonly called the bamboo or wine palm, and "casa," a purgative legumen, for nkasa, "sass," or poison wood, identified with the red-water tree of Sierra Leone, the erythropheum of Professor Afzelius, of the order Cæalpineae, which gave a name to the Brazil.