Adelard Dekker is a recurring character who has been known to provide occasional assistance to Gertrude Robinson.
In 2006, he sends a letter to Gertrude featured in MAG 134 about his theory that a new Entity is emerging, which he dubs The Extinction. He recounts events experienced and shared with him by someone he interviewed, which he considers to be a manifestation of the Extinction.
Around 2012, he helped Gertrude store a large amount of explosives, and in the note also provided a written statement which is featured in MAG 113. He was looking into a possible manifestation of The Extinction. but instead discovers it to be an avatar of The End instead who kills people via dreams, and disables him via brain damage.
Dekker is described by Lawrence Moore as an old, thin, black man shorter than himself. He has short, gray hair and an imposing presence.