The first paragraph on the lower left bottom gave me the answer I was seeking, which was the summer of 1846. This part is not in my booklet.
I think Rev. Frederic Denison was frustrated that no one had mentioned his father or this adventure in any published form. (published in 1858 after Isaac Denison, Jr. had died)
The phrase "penned from the lips of my father" is definitely the words of a minister.
|Historical Magazine at Google Books|
So, we now have a date to answer the first question, but how old was everyone involved in the making of this narrative?
Isaac Denison, Jr. was 56
Rev. Frederic Denison was 27 (and just graduated from Brown University)
Frances Levina Denison (youngest daughter of Isaac) was 11
I can safely conclude that my copy was typewritten by Frances sometime before her death in 1922.