To J. J. Weir 7 May [1868]
Summary
Thanks JJW for his great assistance.
Discusses sexual selection in birds.
Sends queries on secondary sexual characteristics of birds.
Has often marvelled at the different growth of the flowering and creeping branches of ivy.
| Author: | Charles Robert Darwin |
| Addressee: | John Jenner Weir |
| Date: | 7 May [1868] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-6165 |
To J. J. Weir 30 May [1868]
Summary
Glad to have JJW’s opinion on nest-building. Wallace’s view [that skill is learned] is opposed to many facts.
Asks JJW about birds and their behaviour.
Wants information on the first plumage of different breeds of canaries.
| Author: | Charles Robert Darwin |
| Addressee: | John Jenner Weir |
| Date: | 30 May [1868] |
| Classmark: | University of Chicago Library, Special Collections Research Center (Joseph Halle Schaffner collection box 1, folder 2) |
| Letter no: | DCP-LETT-6215 |
To J. J. Weir [before 18 May 1868]
Summary
CD cannot remember whether correspondent believed the wing that Gallus bankiva opens and scrapes before the female, is ornamented. He fears it is not.
| Author: | Charles Robert Darwin |
| Addressee: | John Jenner Weir |
| Date: | [before 18 May 1868] |
| Classmark: | American Philosophical Society (Mss.B.D25.) |
| Letter no: | DCP-LETT-6537 |
From J. J. Weir [before 30 May 1868]
Summary
Reversion of tamed animals to wild behaviour.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [before 30 May 1868] |
| Classmark: | DAR 181: 73 |
| Letter no: | DCP-LETT-5748 |
From J. J. Weir [4–7] May 1868
Summary
Proportion of sexes in ruffs [see Descent 1: 306].
Colour display in linnets, songbirds. Courtship display of Australian pigeon at zoo.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | [4–7] May 1868 |
| Classmark: | DAR 84.1: 75–6, DAR 86: C3–4 |
| Letter no: | DCP-LETT-6151 |
From J. J. Weir 18 May 1868
Summary
Answers CD’s question on whether any female birds regularly sing.
| Author: | John Jenner Weir |
| Addressee: | Charles Robert Darwin |
| Date: | 18 May 1868 |
| Classmark: | DAR 84.1: 81–2, DAR 86: A37–8 |
| Letter no: | DCP-LETT-6181 |
| letter | (6) |
| Darwin, C. R. | (3) |
| Weir, J. J. | (3) |
| Darwin, C. R. | (3) |
| Weir, J. J. | (3) |
