Autograph letter signed to Donald MacAlister
Autograph letter signed to Donald MacAlister
Autograph letter signed to James Porter
Autograph letter signed to James Porter
Autograph letter signed to James Porter
Autograph letter signed to James Porter
Copy of letter to unknown recipient
Copy of letter to unknown recipient
Note by Mrs A. of JCA's one experience of birds nesting as a boy
Note by Mrs A. of JCA's one experience of birds nesting as a boy
Note by Mrs A. of memories of JCA by a friend of hers who visited the Observatory
Note by Mrs A. of memories of JCA by a friend of hers who visited the Observatory
Autograph letter signed to Donald MacAlister
Autograph letter signed to Donald MacAlister
Draft autograph letter signed to Charles Taylor
Draft autograph letter signed to Charles Taylor