Conversation so far:
How was Walter Winchell's professional career start?
He left school in the sixth grade and started performing in Gus Edwards's vaudeville troupe known as the Newsboys Sextet, which also included George Jessel.
How did Walter Winchell do with the troupe?
He began his career in journalism by posting notes about his acting troupe on backstage bulletin boards.
What media outlet Walter Winchell joined to post notes about his acting troupe on backstage bulletins boards?
He joined the Vaudeville News in 1920, then left the paper for the Evening Graphic in 1924, where his column was named Mainly About Mainstreeters.

Question: What are some of the details of that column?
Self-contained rewrite: What are some of the details of the column Mainly About Mainstreeters by Walter Winchell?