1st reference to Luthor's future wife as Ardora. In her only previous appearance--Superman (DC 1939 series) #167 (Feb. 1964)--, she was called Tharla.
Special Metropolis Mailbag due to the assassination of President John F. Kennedy. Instead of the letters it reproduces an article from the Friday August 30, 1963 New York Times that details an upcoming Superman story featuring President John F. Kennedy. A memoriam note explains the story was pulled due to his assassination. The story did finally appear in Superman #170 at President Lyndon Johnson’s request. Sequence added by Bob Bailey, 2005-03-19 (Per Sandell ed.)
Printed in Metropolis Mailbag is a detail from the original JFK and Superman cover by Curt Swan and George Klein that was planned for Superman (1939) #170. It has never been printed anywhere else. Sequence added by Bob Bailey, 2005-03-19 (Per Sandell ed.)