The Edward T. LeBlanc Memorial Dime Novel Bibliography

Edition - The Bradys in the Dark; or, The Hardest Case of All - Secret Service edition, first appearance

(source: Stanford Libraries)
Online Full Text: Stanford Digital Repository
Series: Secret Service: Old and Young King Brady, Detectives no. 14
Item: The Bradys in the Dark; or, The Hardest Case of All
Author: New York Detective (pseudonym used by multiple people)
Date: April 28, 1899
Publisher: Frank Tousey (New York (N.Y.): 24 Union Square) -- United States