Nursery Rhyme Conflation: The Muffin Man and Simple Simon

HUAC's hacks would muffins ban. 
Committee members want to know:
"So: do you know the Muffin Man...?"
(They claim he kneads subversive dough.)
Says I, "I know of no such guy.
He lives down Drury Lane, you say...?
I know a Symon: Sy vends pie.
He near the fairgrounds spends his day."

     (to be continued)