A-grassroots-initiative-for-digital-preservation-of-ephemeral-artefacts-the-Ghostsigns-project A-grassroots-initiative-for-digital-preservation-of-ephemeral-artefacts-the-Ghostsigns-project A grassroots initiative for digital preservation of ephemeral artefacts the Ghostsigns project, article by Laura Carletti, University of Nottingham.