Letter 13151 Darwin, C. R. to Hyatt, Alpheus 8 May 1881 Summary Add + Aware that AH thinks CD has done nothing to advance the good cause of the descent theory. + Obliged for gift of AH's [Tertiary species of Planorbis at Steinheim (1880)]. Transcription The full text of this letter is not yet available online. Footnotes Add
