Autograph letter signed to J. Challis
Autograph letter signed to J. Challis
Copy of letter to W. Whewell
Copy of letter to W. Whewell
Copy of letter to J.P. Gassiot
Copy of letter to J.P. Gassiot
Copy of letter, incomplete, to Franke Parker
Copy of letter, incomplete, to Franke Parker
Typescript copy of article
Typescript copy of article
Copy of letter to H.M. Butler
Copy of letter to H.M. Butler
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
Copy of letter to J.C. Adams
