Is this grammaticaly correct?

I have a quick question, but I would also like to discuss the nature of the word "as", and the various ways in which in can be used. I would also like to discuss other such words because my knowledge of language ussage is not complete.Is this grammatically correct: As I wrote in my first letter, the manner in which I recall the chronology of certain events is not entirely accurate.Now, I want to know if I used the word as properly. Did that make sense. Also, did that sentence sound forced? That was the only way I could write it without sounding like an average bum off the street.And if indeed that sentence was moderately acceptible, it is in my posession. Do not pledjurise.

So how is this?: As I wrote in my first letter, the chronology of events as I remember them may not be entirely acurate. I do however, remember the events themselves.Tell me if it sounds forced.