Comic Title: Adventures of Rex, the Wonder Dog #40
Publisher: DC (National Comics Publications, Inc.)
Address: 480 Lexington Avenue, New York, NY
Cover Date: Jul/Aug 1958
On Sale Date: May 1, 1958 Copyright Date May 1, 1958
Source: Library of Congress, Periodicals 1958

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

Title: "The Hero of Wild Horse Mesa"
Pages: 10

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

Writer: Robert Kanigher
Penciller: Gil Kane
Inker: Bernard Sachs

Feature Character(s)

• Rex the Wonder Dog (last appearance in Adventures of Rex, the Wonder Dog #39; next appearance in Adventures of Rex, the Wonder Dog #40)

Supporting Character(s)

• Danny Dennis (last appearance in Adventures of Rex, the Wonder Dog #39; next appearance in Adventures of Rex, the Wonder Dog #40)

Other Character(s)

• Ben (Danny's uncle; no further appearances)
• Nick (a sheep dog; no further appearances)
• A flock of sheep (no further appearances)

Synopsis:
Rex visits the sheep ranch of Danny's uncle Ben. Nick, the sheep dog, tries to teach Rex how to herd sheep. When danger threatens the herd, Rex helps Nick save them. Only a small lamb sees that Rex was the real hero, but Rex refuses to take credit. Inspired by Rex, the lamb tries to be a hero too. Rex saves the lamb from disaster, but continues to show humility despite his heroic actions.