_Maps of Africa_ (Vol. v., p. 236.).--As your correspondent has no faith in Spruner, but appears to have confidence in Kiepert, it may serve him to be informed that there is a General Map of Africa by Kiepert published in 1850, and that Drs. Barth and Overweg, the travellers in Africa, have this map with them: also, that Kiepert published a map of Algiers, Fez, and Morocco, Tunis, Tripoli, &c. There is also another map by Kiepert, of the Roman Empire in the first centuries of the Christian era, which includes the northern coast of Africa. S. W. _Cromwell's Skull_ (Vol. v., p. 275.).--In answer to J. P., I beg to inform him that the skull of Cromwell is in the possession of W. A. Wilkinson, Esq., of Beckenham, Kent, at whose house a relation of mine saw it. I have no doubt that Mr. Wilkinson would feel pleasure in stating the arguments on which the genuineness of the interesting relic is based. L. W. Miscellaneous. NOTES ON BOOKS, ETC. The publication of _The Works of Sir Thomas Browne_, vol. iii., containing "Urn Burial," "Christian Morals," "Miscellanies," "Correspondence," &c., edited by Simon Wilkins, completes this important contribution to Bohn's _Antiquarian Library_. We could have wished that it had not been included in this series, for we fear that circumstance may deter many from purchasing it; and the writings of Browne may still be read by all with interest and advantage, for, "of the esteem of posterity," said Johnson, "he will not easily be deprived, while learning shall have any reverence among men; for there is no science in which he does not discover some skill; and scarce any kind of knowledge, profane or sacred, abstruse or elegant, which he does not appear to have cultivated with success;" and these writings, with Mr. Wilkins's notes, may now be placed upon our shelves for fifteen shillings! If, when speaking of the discovery of electro-magnetism by Professor Oersted, Sir John Herschel did not hesitate to declare "that the Electric Telegraph, and other wonders of modern science, were but mere effervescences from the surface of this deep recondite discovery which Oersted had liberated, and which was yet to burst with all its mighty force upon the world," he paid only a just compliment to the merits of the great physicist--and he really did no more--it is obvious that Mr. Bohn, in giving as a new volume of his _Scientific Library_, a translation of _The Soul in Nature, with Supplementary Contributions_, by Hans Christian Oersted, has rendered a great service to scientific men. And it would seem, moreover, from the dedication of the translators, that in executing their labour they have been fulfilling Oersted's own wish, that a true representation of his views of nature should be presented to the English public.