[56] It is difficult to determine exactly the work here referred to. Without doubt in this instance, as in those which follow, Foster had access to Rev. S. R. Riggs’s GRAMMAR AND DICTIONARY OF THE DAKOTA LANGUAGE, published by the Smithsonian Institution as one of the Contributions to Knowledge, in 1852. Dr. Riggs was a close student of Siouan linguistics and published much material on the subject, his DAKOTA-ENGLISH DICTIONARY being exhaustively edited with great care by J. O. Dorsey and published in final form in 1892 by the Bureau of American Ethnology. A comprehensive list of the published and manuscript material by Riggs, who was ably assisted by his wife, will be found in Pillings’s SIOUAN BIBLIOGRAPHY, page 60 _et seq._, and in the S. D. HIST. COLL., Vol. II. At various intervals through the original work, Foster acknowledges his indebtedness to the first volume of the MINN. HIST. SOC. COLL. In this there is an excellent article by Riggs entitled THE DAKOTA LANGUAGE, from which considerable assistance was no doubt obtained. [57] According to J. O. Dorsey in BULL. 30, B. A. E., their tribal tradition is, that after separating from the parent stock they “received the name of Pahoja, or Gray Snow.” See also W J McGee, 15th Rept., B. A. E., 1897, who says: “Iowa or Pá-qo-tce signifies ‘Dusty Heads’.” See also ON THE ORIGIN OF THE OTOS, JOWAYS AND MISSOURIS, etc., in Maximilian’s TRAVELS (Vol. III, Clark’s reprint, page 313). This purports to be a tradition communicated to Maj. Jonathan L. Bean, of Pennsylvania, Gov. Sub. Agent to the Sioux, 1827-34. The Iowa are designated as Pa-ho-dje, or Dust Noses. [58] Rev. William Hamilton and Rev. Samuel McCleary Irvin, Presbyterian missionaries to the Iowa and Sauk and Fox Indians located near the mouth of the Great Nemaha river. They established what was known as the Ioway and Sac Mission Press at their station in 1848, issuing therefrom several volumes now of great rarity including AN IOWAY GRAMMAR and THE IOWAY PRIMER, the latter in two editions. (See illustration). For a complete list of their writings see Pilling, BIBLIOGRAPHY OF THE SIOUAN LANGUAGES, p. 31 _et seq._ There is an autobiography of Hamilton in Nebraska State Historical Society REPORTS, Vol. I, 1885, first series. [59] See the map by Waw-Non-Que-Skoon-a.