More supporting player sightings:
I just watched YOU CAN'T CHEAT AN HONEST MAN. Ethelreda Leopold plays Phineas' (W.C. Fields' son) date at the beginning of the movie, while James C. Morton plays a judge toward the end.
And to keep on-subject with regard to Symona Boniface: I found some information on her father, George Boniface Sr., who was a prominent stage actor in the 19th and early 20th Centuries (her half-brother George Jr. also followed in the family profession). Early in his career, he was a member of the same theatre stock company as Edwin Adams, Joseph Jefferson ... and John Wilkes Booth.
One other useless Three Stooges supporting player/Civil War fact I can't fit anywhere else: Christine McIntyre's great-grandfather was a member of the Wisconsin regiment that captured Jefferson Davis.
"I like very much your English punk rock stars, you know, your Lulu, your Dave Clark Five!" - Jerzy Balowski