Made from a variety of different coloured Dalles that were cast in the 1960s and initially intended for the Dalle de Verre windows made by Henry Haig for Clifton Cathedral, Bristol.
The work was devised to give voice to the gap in time between when these Dalles were made and now and the London Underground map was used as a metaphor for this. The underground lines are seen by the gaps between the cut and facetted Dalles, and in turn the Dalles are the coloured rather then the normally coloured underground lines to emphasises the ‘black hole’ in which these Dalles existed before they became part of this artwork.
The glass is surrounded by epoxy resin with grey grit on the reverse in homage to the way many Dalle de Verre stained glass windows were constructed. The front of the work in textured with paint that shows small holes in the resin which are there to express the awareness of Dalle de Verre slowly bubbling to the surface of public recognition.