There are some great old topo maps available from UNH for various Northeast states. Many are from 1927 and 1931. You can access and view these maps via:
http://docs.unh.edu/nhtopos/nhtopos.htm.
The map for Tinkham Hill is on:
http://docs.unh.edu/NH/card27se.jpg
The map for Tinkhamtown Brook is located at the bottom of the map on:
http://docs.unh.edu/NH/mtcb31se.jpg