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From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
19 Aug [1868]
Source of text:
The British Library (Add MS 46434: 143–6)
Summary:

The problem of dimorphic plants and their fertility.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Henry Baker Tristram
Date:
8 Sept 1868
Source of text:
The British Library (Surrogate RP 9485)
Summary:

Thanks for answers to questions, but declines loan of specimens.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
16 Sept [1868]
Source of text:
The British Library (Add MS 46434: 149–50)
Summary:

CD’s oscillating views relating to protection and sexual selection.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
23 Sept [1868]
Source of text:
The British Library (Add MS 46434: 153–6)
Summary:

On their differences concerning sexual selection and protection.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Alfred Russel Wallace
Date:
6 Oct [1868]
Source of text:
The British Library (Add MS 46434: 162–3)
Summary:

Sexual selection, protection.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Johann Friedrich Theodor (Fritz) Müller
Date:
28 Nov 1868
Source of text:
The British Library (Loan MS 10 no 26)
Summary:

Delay in translating Für Darwin.

Comments on plan to repeat CD’s experiments on illegitimate offspring.

FM’s observations on stridulation.

Contributor:
Darwin Correspondence Project