"Madame .44 was an alias used by Jeanne Walker and was a comic book character that first appeared in DC Comics All-Star Western #117
In the Wild West - "Madame .44" -ie Jeanne Walker would dress up in disguise and become a sleuth to fight crime and evil.
As "Madame .44", Jeanne Walker would discover evil men's secrets and then pretend to be an outlaw to establish contacts with various criminal gangs. She would infiltrate such groups and steal the bounty they had acquired from various robberies. Donning a mask and a pair of six-shooters, she would steal from the thieves, and give the goods back to the families.

When I said keep your hands off the gun, Thunder - - I meant it!
Jeanne Walker was the daughter of a man who had helped find one of the largest gold deposits in the West. Jeanne's father was swindled out of his part of the mine and was unable to get his claim recognized in court. He died bitter and broken leaving Jeanne on her own. Jeanne decided she would get even with evil men who were unable to be punished by ordinary laws.
She donned an all white get up and dyed her hair red. She became a photographer in the wild west and soon was very connected with those who were rich... and corrupt. She used her status as a successful photographer to learn about the various underhanded affairs of the wealthy evil men. She created the alias of Madame .44.
As Madame .44, Jeanne would discover the evil men's secrets and then pretended to be an outlaw in order to establish contacts with various criminal gangs. She would infiltrate such groups and steal the bounty they had acquired from various robberies. Donning a mask and a pair of six-shooters, she would steal from the thieves, and give the goods back to the families.
She eventually brought her style of justice to the streets of Tombstone, Arizona. It was in Tombstone that she crossed paths with the infamous Wyatt Earp and even aided him in his struggle against the villainous Clanton Gang. While Wyatt and his family squared off against the notorious Clantons at the OK Corral, she provided the Earp's with an escape route by shooting out all of the gas lamps along the back corridor leading away from the corral.
Soon after the gunfight at the OK Corral, she relocated to the town of Mesa City, where she met a gunfighter named, Johnny Thunder.
Johnny Thunder was an alias used by John Tane, a schoolteacher. John Tane was the son of a sheriff and a teacher. While John's father believed in dealing out justice with guns, John's mother believed that education would solve all the world's ills. John swore to his mother that he would never wear a gun and followed her footsteps becoming a teacher.
As time marched on, John's father found policing the little town of Mesa City as Sheriff became harder and harder to do on his own. That was when John decided he had to help his father, but didn't know how, since he did not want to break his word to his mother. So, he decided to dress up in disguise and use the alias of Johnny Thunder. He would don a cowboy outfit, change his hair, dumb down his speech, and put on his six-shooters. As Johnny Thunder, he and his horse named Black Lightning became a big help to the elder Sheriff Tane and the folks of Mesa City.
It wasn't long after Jeanne Walker and John Tane met that both John and Jeanne began suspecting each other's legitimate identification. After they worked together to defeat a common foe named Silk Black, John and Jeanne finally revealed their true identities to each other. They eventually got married and lived happily ever after with their son and daughter, Charles and Becky.
In those wild west days, John Tane was an extraordinarily well read and educated gent much more than the average Western man. While Jeanne Walker was known for her trick shots with her guns and as being the Robin Hood of the West.