Tractatus de Purgatorio Sancti Patricii is a Latin text written about 1180–1184 by a monk who identified himself as H. of Saltrey. The author is traditionally known as Henry, though this was an insertion and invention of Matthew of Paris and has been contested in the influential work of historian Jacques le Goff. H de Saltrey was a Cistercian in Huntingdonshire.

Huntingdonshire is a local government district in Cambridgeshire, England, which was historically a county in its own right. It borders Peterborough to the north, Fenland to the north-east, East Cambridgeshire to the east, South Cambridgeshire to the south-east, Central Bedfordshire and Bedford to the south-west, and North Northamptonshire to the west.