Cambridge Digital Library

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1. ▸  Collection
   • Darwin Manuscripts (49)
   • Royal Greenwich Observatory Archives (3)
2. ▸  Subject
   • ASTRONOMY (3)
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   • Astronomy (3)
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3. ▸  Page has transcription
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4. ▸  Languages
5. ▸  Date
   • 1800s C.E. (52)