Comic Title: Brave and the Bold #31
Publisher: DC (National Comics Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Aug/Sep 1960
On Sale Date: June 23, 1960 Copyright Date June 23, 1960
Source: Library of Congress, Periodicals 1960

Frequency: Bi-monthly
Cover Price: $0.10
Page Count: 32
Editor: Jack Schiff

Title: "The Secret Beneath the Earth"
Pages: 25

Feature(s):
Cave Carson (of Earth-1)

Writer: France E. Herron
Artist: Bruno Premiani

Reprinted In:
Best of DC #26 (1982)

Feature Character(s)

• Cave Carson (Calvin "Cave" Carson; first appearance; last appearance in Showcase #48; next appearance in Brave and the Bold #32)

Supporting Character(s)

• Bulldozer Smith (first appearance; last appearance in Showcase #48; next appearance in Brave and the Bold #32)
• Christie Madison (first appearance; last appearance in Showcase #48; next appearance in Brave and the Bold #32)

Villain(s)

• A sea serpent, a lava creature, and a magnetic monster (no further appearances)

Other Character(s)

• Two unnamed mountain climbers (no further appearances)

Comments:
Chap. 2: "The Incredible Lava Creature"
Chap. 3: "The Magnetic Monster"

This story features the first appearance of Cave Carson, Bulldozer Smith, Christie Madison, and their digging machine the Mighty Mole.

Synopsis:
When a radio tower and several freight cars are mysteriously pulled underground, authorities contact Cave Carson and expert on underground exploring to solve the mystery. Cave leaves his team of Bulldozer Smith and Christie Madison on the surface to complete a digging machine, the Mighty Mole, while he investigates.

Days later a message tied to a balloon brings Bulldozer and Christie to Cave’s rescue. Cave has learned that an underground magnetic monster is responsible for the destruction. After a while underground chase in the Mighty Mole, Cave is able to destroy the monster using the Mole’s thermo-ray. With the menace defeated, the trio of explorers return to the surface.