I love how they used words in writing back then. I wonder if they also spoke like that in casual conversation(I tend to doubt it).
Fast forward to the year 2010, and imagine what that letter would have looked like(probably would have been an email or text). lol
Even today my Dad speaks in colloquialisms that he did not use in a very formally written note to us recently. There are multiple languages or dialects within the same groups of people.