Conversation so far:
When did Abner Doubleday have a relationship with baseball?
Abner Doubleday is more widely known as the supposed inventor of the game of baseball, in Elihu Phinney's cow pasture in Cooperstown, New York, in 1839.
How did Abner Doubleday invent baseball?
A letter states Abner Doubleday invented baseball as a modified version of town ball, with four bases on the field and batters who attempted to hit tosses from a pitcher.
When did Abner Doubleday invent baseball?
According to the letter, Abner Doubleday set up the first baseball game in approximately 1839
Who played baseball after Abner Doubleday invented it?
According to Abner Graves, the writer of the letter, the first baseball game had matched players from Otesego academy and Green's Select school.
Why is baseball interesting with Abner Doubleday?
The Abner Doubleday myth refers to the belief that the sport of baseball was invented in 1839 by future American Civil War general Abner Doubleday in Cooperstown, New York
What happened after Abner Doubleday invented baseball?
Abner Graves presented a claim that Abner Doubleday invented baseball to the Mills Commission, who sought to prove whether the sport originated in the United States.

Question: What did Mills say about Doubleday?
Self-contained rewrite: What did Mills commission say about Abner Doubleday?