I missed this thread until the last few days. Looks very interesting. Although it has already been done well by South County (very atmospheric melodica and slide guitar!) I'd be interested in having a go at Nathaniel Mobbs, as I spent nearly 7 yrs in Whitechapel in my long-gone student days. I looked up the location and Goodman's Yard is very close to the Tower of London.

It also reminded me of a poem I found on display in Linlithgow Burgh Halls - The Lament of Peter McLean, now lying under sentence if Death. Like Nathaniel Mobbs, it's written in the first person, and also includes advice to shun drink and other "evil passions". Peter McLean was the last man to be hanged publicly in West Lothian on 2.2.1857. The gibber had to be brought from Edinburgh and the executioner from London. Had been meaning to set this to music too.