Frank Reade Junior With His New Steam Horse And The Mystery Of The Underground Ranch

A phantom outlaw haunts the Territory of New Mexico. Sid Rollins and his band of killers appear out of nowhere, pillage and terrorize with impunity, then vanish into thin air, leaving only death and sorrow in their wake. Can Frank Reade Junior, boy genius and greatest of inventors, solve the mystery and bring the ethereal criminal to justice?