Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Hostility of birds toward others with same colour;
nuptial plumage.
Spiza cyanea and Spiza ciris.
Is greatly relieved to hear that the estimate [of the Heliotype Company] was a mistake. Sends lettered copies of seven plates for Expression, and discusses payment to be made by foreign editors for copies of the plates.
Sends a set of plates [for Expression]. Price of the book must be 12s instead of 10s 6d, or 14s instead of 12s.