From Bernard Philip Brent [after August 1856]1
I bred two here, they were dark blues with black bars and bred from black baldheaded Jacobins of the common english breed—2 though rather better than the common run, Red baldheaded Jacobins are by far the commonest colour than black baldheaded—that is those colours with white heads tails and flights—(juniors)
I am breeding mules from the canary and Goldfinch or Linnet etc3 it is nec-essary to have the 〈hen〉 〈d〉omesticated or she will rarely breed in a cage consequently it is most usual to put a cock Goldfinch &c with a hen Canary— but mules are some times bred from a cock Canary and a hen of some other kind that has been bred up tame from the nest. a friend of mine at Calais used to breed mules from a cock canary and hen Green linnet so reared—
I have bred mules fr〈om〉 Goldfinches, Linnets, Green linnets or Green finches, Siskins or aberdevines and a redpoll with hen canaries—
I have rarely tried, and never succeeded with a cock canary and other hen birds though it is not the cock canaries fault. If you are at any time getting German books again4 would it be troubling you to get for me Herr Pistors, work Der Hühnerhof—5
〈I〉 am 〈s〉orry to hear Mrs Darwin is so unwell. hoping for her speedy recovery6
I am my dear Sir | Yours much obliged | B P Brent.
To C Darwin Esqr.
P.S. Is Mr. Tegetmeier ill?7 I will forward the Cottage Gardeners for June as soon as my Father returns the last number8 BPB—
On his breeding of Jacobin pigeons. How reciprocal crosses to produce mules work among canaries, goldfinches, linnets, and green linnets.
Will soon forward copies of Cottage Gardener for June.
Please cite as
Darwin Correspondence Project, “Letter no. 2850,” accessed on 10 December 2016, http://www.darwinproject.ac.uk/DCP-LETT-2850