Superman #135 1998

Superman #135, from DC in February 1960, features 'When Lois First Suspected Clark Was Superman!' Lois Lane's persistent efforts to uncover Clark Kent's secret identity are cleverly foiled by the Man of Steel. This Silver Age issue also includes 'Superman's Mermaid Sweetheart!', where Superman reunites with Lori Lemaris, and notably marks the first appearance of Ronal. A third story, 'The Trio of Steel!', sees Mr. Mxyzptlk engaging Superman, Superboy, and Superbaby.