Much of the text presented in these slides was provided by Richard Jones, Centre for English Local History, University of Leicester. It is an extract from:

Jones RLC (ed) 2012. Manure Matters: Historical, Archaeological and Ethnographic Perspectives, Ashgate Press.

Jones, RLC. 2010. Oh Shit. 106-116 in Franceschini, A. and Milicevic, M. (eds) Beneath the Pavement: A Garden. Radar. (download)

Much of the text from slides 12-15 has been provided by Mark Bradley, Department of Classics, University of Nottingham. It was previously published as:

Bradley, M. 2006. Roman sewers and the politics of cleanliness, OMNIBVS, 51: 3-5.