The Scottish vernacular is rich in colourful euphemisms for inebriation: 'stocious', 'stotting', 'guttered', 'steaming', 'steamboats', 'wellied' and 'hoolit' are just a few. Another is 'mortal', as in 'I was fair mortal last night' (meaning 'I was very drunk indeed'). So 'Mortal Causes' evoked, in my mind, the demon drink, just as surely as it did any darker and more violent imagery.