According to Jacques Vallee: It seems that in 1954, a saucer threw a stone covered with hieroglyphics into the University Gardens in Madrid. Sesma copied the symbol down, and soon two way communication began.”

The Spanish clerk Fernando Sesma claimed that after this incident, he remained in contact with beings from the planet Wolf 424 who are living on the Earth in human form.

A Madrid journalist named Robert F Kennedy three months in advance based on infromation from the Wolf 424 aliens.
(Magonia, 130-131)