Train fares for the early part of the 20th century

From: "Jane Bullard" janemariebullard@yahoo.com

I am writing a book, based on my grandmother's train trip from Qunicy, Illinois, to Denver, in 1916. I need to know how much the train fare might have cost. Is there anywhere on the internet where I could find train fares for the early part of the 20th century? ...

—Jane Bullard