[1] In Dian Belmont's first adventure she was originally a thief named the Woman in Evening Clothes whom Sandman foiled a robbery by.
[2] After a few more stories, her past as a gentlewoman thief was entirely forgotten; she became the rich socialite girlfriend of Wesley Dodds and a fellow detective in his guise as Sandman, with her father being district attorney Lawrence Belmont.
[3][4] In All-Star Squadron #18 (dated February 1983, but set on Earth-Two in the early 1940s), writer Roy Thomas explained Dian's disappearance from the series by having Nazi spies murder her after mistaking her for the Sandman.
[6] In "The New Golden Age", a flashback to the summer of 1940 has Dian Belmont wishing Wesley good luck in his meeting with Colonel Breckinridge.
[10] After she and Wesley are interviewed by the detectives about Fog's attack on Wheeler Vanderlyle's penthouse and him falling out the window, Dian also advises them to talk to her father if new developments come up from the crime scene.
[11] When Wheeler Vanderlyle is revealed to be the culprit of the theft of Wesley's journal and he was badly hurting Sandman, Dian shoots him in self-defense.