This Roman fort guarded the Eastern end of the Stainmore Pass,a major cross Pennine route,to Carlisle,the most northerly Roman town in the Empire. see http://www.roman-britain.org/places/lavatris.htm see http://www.roman-sites.com/england/bowes/bowes.htm see http://www.pastscape.org.uk/hob.aspx?hob_id=17561&sort=4&search=all&criteria=lavatris&rational=q&recordsperpage=10