Speck did one of the earliest and most extensive ethnologies on the Yuchi. It is a fairly thorough turn of the century treatment, but it is reputed that none of the Yuchi elders wanted to provide any information to him because of his arrogant behavior -- his chief source was a half-Yuchi boy. This is substantiated by his ascertion that the Yuchi have forgotten most of their pre-Oklahoma traditions. Still the work is an anchor point between what its known of the Yuchi in early history and what has been written since. Speck was a good observer and a competent enthnologist.