This collection consists of five series. Series I contains correspondence from DeKok and others, as well as notes relating to the Centralia fire in the context of DeKok's research. Series II pertains to the book "Unseen Danger." Series III comprises audio interviews and select transcripts from Centralia residents and concerned parties, as well as recordings of town meetings, etc. Series IV contains miscellaneous research materials. Series V contains two dramatic works inspired by the Centralia disaster.