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1850-1859::1850::01 in date 
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From:
Charles Robert Darwin
To:
Richard Owen
Date:
[Jan – 23 Mar 1850]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

CD regrets the trouble RO has had about C. G. Ehrenberg’s parcel.

He is reading On the nature of limbs [1849] with uncommon interest and admires the way Owen worked out the toes.

Also has read On parthenogenesis [1849] with great interest.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Charles Lyell, 1st baronet
Date:
[3 Jan 1850]
Source of text:
American Philosophical Society (Mss.B.D25.90)
Summary:

Discusses CL’s paper, "On craters of denudation" [Q. J. Geol. Soc. Lond. 6 (1850): 207–34], which "will be a thorn in the side of É[lie] de B[eaumont]". Notes evidence from Galapagos overlooked by CL. Mentions other examples of craters.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
George Brettingham Sowerby, Jr
Date:
9 Jan [1850]
Source of text:
American Philosophical Society (Mss.B.D25.)
Summary:

Sends thanks for a note and returned drawing.

He is sending more text.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
James Scott Bowerbank
Date:
[24 Jan – 7 Mar 1850]
Source of text:
American Philosophical Society (Mss.B.D25.91)
Summary:

Thanks JSB for specimens of fossil Balanidae.

Contributor:
Darwin Correspondence Project