Comic Title: Detective Comics #319
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: September 1963
On Sale Date: July 25, 1963 Copyright Date July 25, 1963
Source: Library of Congress, Periodicals 1963

Frequency: Monthly
Cover Price: $0.12
Page Count: 32
Editor: Jack Schiff

Title: "J'onn J'onzz -- Wizard of 1463"
Pages: 12

Feature(s):
Martian Manhunter (of Earth-1)

Artist: Joe Certa

Reprinted In:
Showcase Presents:Martian Manhunter Vol. 2 TPB (2009)

Feature Character(s)

• Martian Manhunter (last appearance in Detective Comics #318; next appearance in Brave and the Bold #50)

Supporting Character(s)

• Captain Harding (last appearance in Detective Comics #318; next appearance in Detective Comics #320)
• Diane Meade (last appearance in Detective Comics #317; next appearance in Detective Comics #324)

Villain(s)

• The Black Duke and his men (no further appearances)

Other Character(s)

• Prince Charles, Captain Louis Moray, and citizens of 15th century Europe (no further appearances)

Synopsis:
While vacationing in Europe, detective John Jones discovers a time warp inside a cave. When he enters the warp he emerges in 15th century Europe and saves the life of Captain Louis Moray. J’onn then uses his powers to rescue Prince Charles from the evil Black Duke. Charles and J’onn then rally the people to defeat the Duke and restore the prince to power.