Excursions in Madeira and Porto Santo : during the autumn of 1823, while on his third voyage to Africa / by the late T. Edward Bowdich ; to which is added, by Mrs. Bowdich, I. A narrative of the continuance of the voyage to its completion, together with the subsequent occurrences from Mr. Bowdich's arrival in Africa to the period of his death. II. A description of the English settlements on the river Gambia. III. Appendix: containing zoological and botanical descriptions, and translations from t