Conversation so far:
What is important about the south dakota years?
Baum was born in Chittenango, New York in 1856 into a devout Methodist family.
Who were his parents?
Cynthia Ann (nee Stanton) and Benjamin Ward Baum.
Did he have siblings?
and was the seventh of nine children.
Where did he go to school?
From the age of 12, he spent two miserable years at Peekskill Military Academy but.
where did he go after that?
after being severely disciplined for daydreaming, he had a possibly psychogenic heart attack and was allowed to return home.
What else did he do during this time?
Baum started writing early in life, possibly prompted by his father buying him a cheap printing press.
What did he write during this time?
The brothers published several issues of the journal, including advertisements from local businesses.
What else did they do ?
By the age of 17, Baum established a second amateur journal called The Stamp Collector.

Question: What did he work on after that?
Self-contained rewrite: What did Baum work on after establishing a second amateur journal called The Stamp Collector?