I recently came across a cassette recording of a telephone conversation that my dad and his brother, Eldon Cornelius, had in 1975. Uncle Eldon had farmed in the Madrid area for many, many years. One day in September 1975, he came across a dead cow in his pasture that had been thoroughly mutilated. He told my dad the story and my dad wanted to record the conversation. They agreed upon a date and time to talk.
The conversation took place on October 28, 1975 and lasted for about 65 minutes.
My recollection was that Dad made several copies of the conversation and arranged to give a copy to Dr. Allen Hynek of Northwestern University. Dr. Hynek was one of the best-known UFO researchers at the time and had studied other incidents of cattle mutilation. As far as I know, there was no follow-up with Dr. Hynek and the tape was never returned. He died in 1986.
Anyway, I found the cassette tape in a box and figured out how to hook up my old tape recorder to my PC. The transfer went fine and I burned a few CDs, including one for Eldon who is now retired and living in North Platte, Nebraska.