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Sketch of planet conjunctions

Full transcription

Diagram of position of Earth    
Venus and Jupiter when the two planets are seen near together. Jupiter revolves in 12 years Venus in 8 months

[annotated diagram of relative positions of earth, Venus and Jupiter, with the position of Jupiter March 1892 labelled]

Next September and October Jupiter will be nearest us & opposite the sun - [therefore] seen at midnight.  Venus can never be opposite the Sun, but is seen only at morning or evening.

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Wallace Letters Online

Letter to Alfred Russel Wallace from the Royal Society, about his Darwin Medal award

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