Tree climbing will often take you in many directions. Out this branch...out that branch...and sometimes falling out of the tree. Getting up and starting again can be a challenge. Recognizing resources can be a help when a few of the branches seem impossible.
These resources may come from a variety of locations. People, places, and things, may be some of them. A library, a court house, a book store, or any number of things may help. For me, a University Library was always most helpful. Special collections, reference rooms, archives, etc...etc... may open many doors. Every state has at least one university library ready to help. [Parking always seems to be a problem!]
What have been your resources? Please post a comment to help share your own experiences. Falling out of trees...as long as you haven't broken anything...dust yourself off and look for some resources.