From BBC News:
In recent years children as young as three have given evidence in court cases, but in the past children under 14 were seen as unreliable witnesses. A notorious 17th Century witch trial changed that.
Nine-year-old Jennet Device was an illegitimate beggar and would have been lost to history but for her role in one of the most disturbing trials on record.
Jennet's evidence in the 1612 Pendle witch trial in Lancashire led to the execution of 10 people, including all of her own family.
In England at that time paranoia was endemic. James l was on the throne, living in fear of a Catholic rebellion in the aftermath of Guy Fawkes' gun powder plot. The king had a reputation as an avid witch-hunter and wrote a book called Demonology.