  Since a period of (total) silence between the hearing of two sounds would not itself contain any change or succession – at least of an auditory kind – the concept of duration cannot be derived from this period of silence, or so Hume maintains. For an ingenious attempt to derive a consistent doctrine from Hume’s various (sometimes puzzling) remarks on time and temporal concepts in the Treatise see Baxter (2007); for further useful discussion see Bardon (2007).