106 years is amazing! You are lucky to have had such a relationship and to have information of that value to share. We are lucky you are sharing it. Future generations will be ever grateful. Thank you!
Freespace Pages are very flexible. You can call it anything you wish. As I'm sure you saw on the link above they could be for a place, an item, a story, almost anything.
The more links it has and the larger demographic you appeal to, the more views the page will get. It will be more likely to show up in google searches and more likely to be looked at by people catching words that pertain to thier quest.
I'm sure you have plenty of ideas brewing already, but i'll share one...
You could create a page with the name being something like what you wrote above. Then you gradually add something to it: Pictures. An introductory paragraph. A heading something like "Grandmother's Journal", where you could explain about it, link to her profile, put a link to pictures of the journal, and links to the profiles of others she mentions in the journal weather they are your relative or not. You could link to the governor if she said something about him/her.
At any time you could add another heading like "Traditions in the Town of X" and do the same kind of stuff.
You can edit or change any of it at any time so it's stress free.
I personally have not regretted taking on my project and look forward to the large investments in it still to go. It has already taught me a great deal and helped to solve family mysteries that I certainly never would have discovered answers to otherwise.
It's very user-friendly and the help pages explain it all so I'm sure you will have no trouble, but if you have any questions about it or wish any help you can post here or contact me at any time.