Comic Title: House of Secrets #63
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Nov/Dec 1963
On Sale Date: September 19, 1963 Copyright Date September 19, 1963
Source: Library of Congress, Periodicals 1963

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Editor: Murray Boltinoff

Title: "The Nest of Fear"
Pages: 11

Feature(s):
Mark Merlin (of Earth-1)

Writer: Jack Miller
Artist: Mort Meskin

Feature Character(s)

• Mark Merlin (last appearance in House of Secrets #62; next appearance in House of Secrets #64)

Supporting Character(s)

• Elsa Magusson (last appearance in House of Secrets #62; next appearance in House of Secrets #64)
• Memakata (last appearance in House of Secrets #61; next appearance in House of Secrets #65)

Villain(s)

• An electronic brain, a roc, a kraken, a Frankenstein monster, and a futuristic human (no further appearances)

Synopsis:
Mark Merlin travels around the world to learn the secrets of legendary creatures. His investigation of the roc, the kraken, and Frankenstein's monster lead him to a hidden cave in Madagascar. Inside the cave, Mark finds each creature encased inside glass tubes. An electronic brain, responsible for the creation of the creatures traps Mark. He escapes by transfering his mind to Memakata.

The electronic brain then creates an advanced human. to attack Mark. When Mark flees the cave, he saves Memakata. His action causes the advanced man to switch sides, defeating the kraken, roc, and monster. After Mark escapes the cave, the advanced man destroys it with an explosion.