Hi, I have no connection to the Bull family, but do collect Lace bobbins and I'm sure you know there are bobbins to remember the hanging of William Bull in 1871. I have been doing a bit of research, which is how I came across this chat. There are two ballads in the Bodleian library, the first ,titled, "Horrible outrage and murder at Little Staughton, bedfordshire" in the introduction it says that William Bull had been imprisoned for six months for the rape of a child. The other is titled "the trial and sentence of william bull". The actual ballads are the same for both titles but the introductions differ, the first is written before the trial the second after the trial. Sorry if you already knew this, but if not, search, broadside ballads online, for, "murder and outrage", and "sarah marshall"