Data of the locations of 761 cases of primary biliary cirrhosis in several adjacent health regions of north-eastern England, along with 3020 controls representing the at-risk population, collected between 1987 and 1994. These data were first presented and analysed by Prince et al. (2001); subsequent analysis of these data in the spirit of sparr was performed in Davies and Hazelton (2010). Also included is the polygonal study region.