I'm posting a recording of the letter being read; listen to it here.
WARNING: the letter is extremely graphic, and describes a murder, rapes and repeatedly beatings.
You'll first hear Morris introduce the letter, before he hands it off to someone else to read.
(This is, unfortunately, a recording from my laptop, what I use to keep recordings while I'm typing notes---I don't intend for these recordings to become public, but it's all I have for this. The clicking you hear is my typing. My apologies.)