Copy of paper
Copy of paper
Copy of paper to James Challis
Copy of paper to James Challis
Transcripts of papers and letters from the Royal Greenwich Observatory, made for Donald MacAlister
Transcripts of papers and letters from the Royal Greenwich Observatory, made for Donald MacAlister
Copy of letter to G.B. Airy
Copy of letter to G.B. Airy
Copy of letter to Robert Main
Copy of letter to Robert Main
Copy of letter to G.B. Airy
Copy of letter to G.B. Airy
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Extract from 'Le National'
Extract from 'Le National'
Copy of letter to J.F.W. Herschel
Copy of letter to J.F.W. Herschel
Copy of letter to James Challis
Copy of letter to James Challis
