Comic Title: House of Secrets #59
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Mar/Apr 1963
On Sale Date: January 24, 1963 Newsstand Date January 24, 1963
Source: House Ad, Tomahawk #85, Page 10

Copyright Date January 24, 1963
Source: Library of Congress, Periodicals 1963

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Circulation: 165000
Editor: Murray Boltinoff

Title: "The Demon Spirit That Invaded Mark Merlin"
Pages: 10

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

Writer: Jack Miller
Penciller: Mort Meskin
Inker: George Roussos

Reprinted In:
Phantom Stranger #18 (1972)

Feature Character(s)

• Mark Merlin (last appearance in House of Secrets #58; next appearance in House of Secrets #60)

Villain(s)

• A man impersonating Philip Langley (no further appearances)
• Two spirit creatures (no further appearances)

Other Character(s)

• Martin Langley (heir to a fortune; no further appearances)
• Sedgewick and Morden (appear in flashback; no further appearances)

Synopsis:
Two cousins, Philip and Martin Langley, approach Mark Merlin concerning a curse that afflicts their family. The family inheritance is protected by one curse that threatens any Langely who tries to claim it. Another curse prevents non-Langley family members from claiming the treasure. Mark agrees to help the men overcome the curses.

When the men approach the location of the buried treasure, a spirit creature begins attacking Martin. Mark Merlin uses his mystic potions to keep the spirit from killing them. When they finally reach the location of the treasure, Philip tries to claim it and is attacked by another spirit being. Mark saves him, but the spirits have proved that Philip is an imposter. However, neither man can claim the inheritance as the treasure becomes sealed underground for another 100 years.