Illusion Films bought the rights to Stone by Stone and created a full-length documentary titled Passages of Time. that premiered near Acadia National Park in  Ellsworth Maine.  Using spectacular imagery, voiceovers and filmed interviews, it captures the mood of the stone wall history and its conservation movement from many angles.  The film was available only on CD, a technology that has long since passed.  It’s no longer publicly available.  A copy is within the archive of the University of Connecticut (Robert Thorson collection).