Place of publication: London
Collation: 24 p. ; 19 cm.
Notes: First letter dated September 18th, 1886. Second letter dated September 27th, 1886. Publisher's advertisements on p. 21, 22 and 24.
Place of Publication: Brussels
Collation: 20 p. ; 18 cm.
Notes: Includes bibliographical references. Text in French. From the library of Dr Moncure Conway.