I too have been fascinated by this song from when it first came out. I have struggled with the lyrics and couldn't find them anywhere. Today is the first time I have found anyone willing to have a go. I have printed them out and found a few things. For instance the Marshalsea was a prison which housed mainly debtors. I have listened on the iPod to the names and have a few ideas. For instance, William Grindcob is documented. I have the file saved in Word, so if you're interested in my version let me know.