DEXTER, Mich. (AP) — One man played a violin and another used a “universal 
  mathematical equation” in unsuccessful attempts to entice Unidentified Flying 
  Objects to return.
  
  Hundreds of persons, many with cameras and binoculars, braved an icy rain in 
  hopes of catching a glimpse of the glowing discs that have been reported three 
  times within a week near this small southeastern Michigan community.
  
  Meanwhile, another report of a sighting came from Civil Defence Director 
  William Van Horn of Hillsdale County, about 65 miles southwest of the Dexter 
  area.
  
  Van Horn said he used binoculars to observe a flying object east of Hillsdale 
  from 10:30 a.m. Tuesday. Van Horn said he watched it from a dormitory at 
  Hillsdale College after residents told him they had sighted a mysterious 
  object.
  
  At Dexter, believers and non-believers converged on the area where a farmer 
  and his son said they saw one of the UFOs in a swamp.
  
  TRIED MUSIC LURE
  
  Sheriff’s deputies said one man brought his fiddle and began playing; hoping 
  the pilots of the UFOs would hear and come to earth.
  
  Another man sat in his car blinking his headlights in code. He explained that 
  the code was for the universal equation pi which is known and understood, he 
  said, throughout the universe.
  
  Some persons ventured into the swampy area, seeking evidence that the craft 
  had landed there.
  
  The latest Dexter sightings were made Sunday by more than a score of persons, 
  including police officers. A composite description put the objects as 
  triangular in shape, with a V-shaped antenna protruding from their 
  undercarriages. They are said to bear lights which flash in a variety of 
  colors and intensities.
  
  Meanwhile, U.S. representative Weston Vivian of Michigan, planned to ask the 
  U.S. defence department to investigate the reported sightings and 
  Wright-Patterson air force base said its unidentified flying objects office 
  had begun an investigation.