I have only touched on those which have more immediately come within my personal observation. Too much care cannot be taken by Europeans in drinking, and even washing in the waters of Africa, which should always undergo a filtering preparation, and I am persuaded that great circumspection should be used in this respect: these and other precautions, with a generous, but regular system of living, would no doubt tend to diminish the fatal tendency of diseases in Africa. Without doubt, a series of professional observations and enquiry into the temperature and periodical variations of the climate of Africa, and its diseases, would be attended with the most important advantages to the science of physic, and might ultimately prove of incalculable consequence in preserving the valuable lives of our brave soldiers and sailors, exposed to all the ravages of tropical climates. Advantages that are well worth the attention of government, which would train up a body of physicians and surgeons, initiated into the mysteries of the diseases peculiar to those countries, which might tend to preserve a large portion of human beings of the utmost consequence and importance to the state; and it might form a part in the organization of colonial establishments, to attach thereto an institution of this nature. CHAPTER X. _The Author visits the Isles de Loss.--Remarks on those Islands.--Touches at the River Scarcies.--Arrives at the Colony of Sierra Leone.--Embarks for the West Indies--Lands at the Colony of Demerory.--Some Observations on the Productions of that Colony, Berbice, and Essequibo, and on the Importance of Dutch Guiana to the United Kingdom, in a political and commercial View._ On the 4th of July, I rejoined the Minerva at the Palm Trees, and on the 5th we weighed and passed the bar of the Rio Pongo, steering our course for the Isles de Loss; and on the 6th came to an anchor off Factory Island. The Isles de Loss, in the Portuguese language meaning Islands of Idols, are so called from the idolatrous customs of the natives, and are seven in number; Tammara, Crawford's, Factory, Temba, White's, Goat, and Kid islands. Tammara is the largest, but very difficult of approach, and has few inhabitants; Crawford's has two factories for trade, belonging to gentlemen formerly in the service of the Sierra Leone Company; and Factory Island has an American establishment, conducted by a Mr. Fisk, These are the principal (the others being little more than barren rocks), and they abound in vegetation and natural productions. Squilly, or the sea onion, to which great medicinal qualities are ascribed, grows in great abundance in these islands, and might be procured in almost any quantity. Dr. Lewis, in the _Materia Medica_, or _Edinburgh Dispensary_, describes the peculiar qualities of this root.