Volunteers at the Association for the Recovery of Historical Memory laboratory in Ponferrada. In common with her colleagues, Nuria Maqueda (left) is unable to find paid employument and now works full-time as a volunteer identifying mass graves containing anonymous victims of the civil war. Photogragh: Guy Hedgecoe

Nuria Maqueda is carefully cleaning the dirt off a bone with a small, fine-toothed brush. She still doesn’t kno(...)