Threshold difficulties, or, Hints to enquirers
By: by E.S.G. Mayo.
Contributors: Harry Houdini Collection (Library of Congress)
Publisher: Psychic Press
Published: 1904
Place of publication: Birmingham
Language: eng
Number of pages: 16
Subjects: Spiritualism.
Other titles: Threshold difficulties; Hints to enquirers; Two worlds (London, England)
Notes: "Being a lecture delivered at the Queen Street Hall, Cardiff, on Jan. 18th, 1903 ... reprinted from the Two worlds": cover.

With: Neale, J.M.  The unseen world ... 2nd ed. London : Joseph Masters, 1853.  Bound together subsequent to publication.