Comic Title: Adventures of Rex, the Wonder Dog #29
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Sep/Oct 1956
Approx. On Sale Date: July 3, 1956 Copyright Date July 1, 1956
Source: Library of Congress, Periodicals 1956
Until 1958 DC did not report actual on sale dates to the copyright office
The publication dates listed in LoC records are NOT release dates.

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Julius Schwartz

Title: "Secret of the Castle Treasure"
Pages: 8

Feature(s):
Rex the Wonder Dog (of Earth-1)

Feature Character(s)

• Rex the Wonder Dog (last appearance in Adventures of Rex, the Wonder Dog #29; next appearance in Adventures of Rex, the Wonder Dog #30)

Supporting Character(s)

• Danny Dennis (last appearance in Adventures of Rex, the Wonder Dog #29; next appearance in Adventures of Rex, the Wonder Dog #30)

Villain(s)

• The King of Braustark (a crook; no further appearances)
• The King's henchmen (Brawny and Thorp named; no further appearances)

Other Character(s)

• Peter Danvier (no further appearances)
• Pierre Danvier (Peter's ancestor; no further appearances)

Comments:
This story takes place on September 10, 1956.

Synopsis:
Danny's friend Peter Danvier learns of a prophecy left by his ancestor. The prophecy predicts wealth will be discovered in his castle exactly 300 years after the prophecy was written with the help of a king. The king of a small country joins Peter, Danny, and Rex in the castle on the specified day. However, the king turns out to be a criminal out to get the treasure for himself. Rex defeats the crook and his gang. The prophecy comes true as there is reward for the crooks' capture. Rex's name in latin means "king", so that part of the prophecy comes true as well.