The Edward T. LeBlanc Memorial Dime Novel Bibliography

Edition - The Bradys' Black Hand Mystery; or, Running Down the Coal Mine Gang - Secret Service edition, second appearance

(source: Digital Library @ Villanova University)
Online Full Text: Digital Library @ Villanova University
Series: Secret Service: Old and Young King Brady, Detectives no. 1121 (chapters I-XII; conclusion, pages 1-20)
Item: The Bradys' Black Hand Mystery; or, Running Down the Coal Mine Gang
Author: New York Detective (pseudonym used by multiple people)
Date: July 16, 1920
Publisher: Frank Tousey (New York (N.Y.): 24 Union Square) -- United States