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A French collector [Alcide d’Orbigny] has been at the Rio Negro and will probably have "taken the cream". CD’s luck with fossil bones, among them a large extinct armadillo-like animal. Describes some birds, toads, Crustacea, and other marine specimens. Nearly all plants flowering at Bahia Blanca were collected. Is sending two large casks of fossil bones by packet.
Sending check in payment of JH's article on Celestial Mechanism in the Quarterly Review. Would be pleased if JH would now write an article on comets.
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Is sending JH some writings by Mr. (Mrs.?) Thomas Malthus on idiotic people and a book by WW [Astronomy and General Physics]. Mentions Richard Jones. Asks whether WW has seen 'the comet.'