This information was not covered during my training.  I have researched this to appease my own curiosity!  My take on this discovery is that many different cultures and locations were gifted this information at various times.  I believe that as a location or culture began vibrating into healing, individuals were bestowed this information to enhance their ability to heal, a gift of remembrance of their connection to the Records!  As they healed themselves, they began training others in the modality.  I have found ‘roots’ in India, Tibetan Monks, Buddhism, and whales.  Whales are powerful record keepers!  Any connected deeply to water and/or sea life can and have accessed the Records, no matter the label attached.