From B. P. Brent 15 June 1861
Dallington | nr. Robertsbridge | Sussex.
June 15th. 1861
Being in conversation the other day with my Father respecting his crossing the Cacti, he said he found them quite fertile and averaged three seeds to a fruit, but the seeds varied very much in the period of germination, he had crossed some several times—1 the following I took from his dictation as I thought it might interest you
〈Respe〉cting the fertility of hybrids:
The Hybrid Cactus, Jenkensoni, reproduced with one parent viz Epiphyllum Speciosum;—
The Hybrid Cereus Cactus, Mallisoni, reproduced, with Epiphyllum Ackermani;
Cactus Jenkensoni, itself a hybrid of Epiphyllum Speciosum, and Cereus Speciosissimus—reproduced with the Hybrid Cereus Mallisoni, which was produced between Cereus Speciosissimus and Cereus Flagelliformis— or it may be stated thus.
and produced Jenkensoni.
Cereus Speciosissimus reproduced a compound
hybrid not named— [LEAVE A SPACE HERE BETWEEN DIAGS]
and produced Mallisoni
Unfortunately my Father has no memoranda of his crosses nor did he have any of his productions named. but I think you may rely on the the truth of the abo〈ve〉
〈A〉 second Sow Guinea pig went 〈to〉 boar on the 13th. inst. I have 〈p〉ut her in a hutch by the fire and shall keep her as warm as I can, the one that went on May 25th. is out of doors in a north aspect and as cold as I can place her, so I hope to see if temperature has any effect.2
Miss Watts in a recent letter wished me to inform you she found the Crested fowls stupid but she puts in a word for her favourite Brahmas— I enclose that part of her letter.3
I am | Dear Sir | Your’s sincerly | B P Brent
To C Darwin Esqr.
On his father’s crossing experiments with cacti, in which hybrids were found quite fertile.
On his breeding of guinea-pigs.
Sends Miss E. Watts’s message about crested fowls and Brahmas.
Please cite as
Darwin Correspondence Project, “Letter no. 3184,” accessed on 18 January 2017, http://www.darwinproject.ac.uk/DCP-LETT-3184