There is an extensive documented history of trance as evidenced by the case-studies of anthropologists and ethnologists and associated and derivative disciplines.
Many ledger artists worked with ethnologists, by documenting shield and tipi designs, ethnobotanical information, winter counts, dance customs and regalia, and other cultural information.
The garden was created in 1980 as a collaboration between botanists, ethnologists, and historians to display plants of ethnobotanical importance through the ages.
In the course of his life he was an ornithologist, explorer, journalist, broadcaster, soldier, guerrilla, ethnologist, museum curator, archaeologist, documentarian, film-maker, conservationist, and writer.
During this period, the region became a major focus of historians, linguists and ethnologists, interested in its archaic customs, language and common law.
The contemporary nature of the responses, no matter how incomplete or biased some may be, are nonetheless of considerable value to modern ethnologists.