Lois Wilson?

In Allen Barra's INVENTING WYATT EARP, there is a reproduction of a poster for the movie LAW AND ORDER, apparently from the time of its release. In the credits, in big print, right after Walter Huston and even before Harry Carey, is "Lois Wilson." The IMDB credits list her as "Mabel." But I have seen this movie several times and have never seen any "Mabel." The poster shows a flapper-type woman who is apparently sounding off about something, and if this is "Mabel," then I guess she's that "soiled dove" in the movie who unleashes a stream of apparent obscenity at the lawmen just as wagons and horses in the street conveniently pass by to drown her invective out.

In Bob Boze Bell's Wyatt Earp book there is a still from LAW AND ORDER showing a scene that apparently was cut out of the movie, with the four protagonists gathered around a table where they have, it seems, been having dinner with a blonde woman. I would guess this is the woman whose honor Brandt (Carey) has defended when one of the Northrups defaces her poster; I would also guess it's the woman (MAJOR SPOILER ALERT) whom Brandt mentions on his death-bed. But I don't recall her name being "Mabel." From what I know of Lois Wilson she was a pretty big star in early movies and was even the first actress to play "Daisy" in the first movie version of GREAT GATSBY. So did she play Brandt's sweetheart, or that foul-mouthed hooker we see for only a few seconds?