- Letter written in 1999 by Brando Crespi, anthropologist, researcher and journalist, founder of the "Mobius Group" and
"Pro Natura International".
"Umberto's capabilities as a particularly gifted "psychic" are in my mind beyond question,
and I write this based on my experience with dozens of "psychics" on four continents..."
- Letter written in 1981 by Stephan A. Schwartz, President and Research Director at the "Mobius Group", now columnist for the
and editor of the daily web publication Schwartzreport.net.
"Not only have I enjoyed working with you as a person, but as a parapsychologist,
I am much impressed with your consistent and high quality responses..."