In his Treatise (Book 1, Part 4, sec. 6) David Hume suggested that the idea of an enduring discoverable self was unfounded. Introspection revealed 'nothing but a bundle or collection of different perceptions, which succeed each other with an inconceivable rapidity, and are in a perpetual flux and movement.' Many people have noticed the similarity between Hume's position here and Buddhist discussion of the self. Alison Gopnik has discovered a possible route of influence.
There are reliable versions of David Hume's philosophical texts, (and reproduction of Hume's own manuscript of his Dialogues Concerning Natural Religion) at www.davidhume.org