Locations discussed in:

• Macmillan, Malcolm B. (2001). "John Martyn Harlow: Obscure Country Physician?". Journal of the History of the Neurosciences 10 (2): 149–162.
• Macmillan, Malcolm B. (2000). An Odd Kind of Fame: Stories of Phineas Gage. MIT Press. p.27,344
• Macmillan, Malcolm B. (PGIP). "The Phineas Gage Information Page. Phineas Gage sites in Cavendish." The University of Akron.

The graphical skill of the annotation leaves something to be desired, and if someone wants to go back to File:CavendishVermont 1869Map Beers.jpg and have another go, please do. The accident "locations" are not understood well enough to justify the precision implicit in the use of arrows -- a brace or something like that covering the general area (and, if truth be told, a bit of the area off the map to the south, if there's some way to indicate that) would be more honest.