I was a big fan of Steve Allen, one of the wittier performers ever on television. Milton Berle used to say that Allen's mother — a stage performer in vaudeville named Belle Montrose — was the funniest women in that field and the source of Steve's sense o' humor. I'm not sure how true that is but I just came across this rare video, introduced by Mr. Berle, of Steve performing with his mother on some TV show. This is reportedly the act she did for many years with Steve's father…