This collection comprises reports and database tables from the 'Islands of stone: Neolithic (and later) Crannogs in the Outer Hebrides' Project. This project, a collaboration between the University of Southampton, University of Reading and Historic Environment Scotland, was set up to explore a recently discovered set of crannogs in the Outer Hebrides dating to the Neolithic period. It sought to establish the extent to which Neolithic crannogs are widespread across these islands (and beyond) and to elucidate further their character through investigation of one 'showcase' site, Loch Bhorgastail, Lewis.