Why did Michigan withdraw from the Big Ten? (circa 1907)

This is random as hell, but does anyone know the story behind Michigan leaving (or expulsion from) the Big Ten/Western Conference in 1907? I found a few references to it on the interwebs... the general idea is that U-M President James Angell did not see eye-to-eye with the rest of the conference regarding college football reform. But I'm curious what, specifically, were the issues that were so divisive? The Wikipedia article on Charles Baird suggests it was the number of games and ticket prices (Michigan opposed a reduction in games played and a cap in ticket prices). Here are the links I found: http://bentley.umich.edu/athdept/football/fbart/aof1901.htm http://bentley.umich.edu/research/topics/angell.php http://en.wikipedia.org/wiki/Charles_A._Baird Does anyone have more to add to this story? Sorry I don't know why but I find this interesting.