Found a brand new reference to the story  - see this link very interesting. Many new details of the incident "An Act of God".


http://books.google.com/books?id=j3JN29va0l8C&pg=PA140&lpg=PA140&dq=george+grinnell+-%22george+bird+grinnell%22&source=bl&ots=f750ySEJmO&sig=3B0vpSGjtFoWwWlnErRXAlgjdSU&hl=en&sa=X&ei=5eh5UMKdEer6igLVp4G4BA&ved=0CEgQ6AEwBDgU#v=onepage&q=george%20grinnell%20-%22george%20bird%20grinnell%22&f=false