It might be interesting to know that Boas's "Notes on the Ponka Grammar" in the Proceedings of the International Congress of Americanists of 1906, heavily reprised in Boas & Swanton 1911, is credited to a seminar led by Boas and involving "Miss Martha W. Beckwith, Mr. Albert B. Lewis, and Mr. R.A. Lowie." I don't recognize Beckwith or Lewis.