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From:
[William] [Spottiswoode]
To:
Alfred Russel Wallace
Date:
20 July 1871
Source of text:
British Library, The: BL Add. 46441 f. 32
Summary:

Invitation for ARW to meet the Emperor of Brazil.

Contributor:
Alfred Russel Wallace Correspondence Project
From:
Charles Robert Darwin
To:
John Dean Caton
Date:
20 July 1871
Source of text:
American Philosophical Society (Mss.B.D25.402)
Summary:

Letter of introduction for his sons [G. H. and Francis Darwin].

Contributor:
Darwin Correspondence Project