Place of publication: London
Collation: 34 p. ; 22 cm.
Notes: From the library of Dr Moncure Conway. Inscription on front page: M D Esq from the author 1 June 1873. Includes bibliographical references.
Place of publication: [London]
Collation: 10 p. ; 22 cm.
Notes: Lecture given at the weekly evening meeting of the Royal Institution of Great Britain held Friday, March 15, 1872. From the library of Dr Moncure Conway.