Apart from such traditions or myths, it is found that even the taboos and the names of the gentes, subgentes, phratries, and persons are objects of mysterious reverence among many, if not all, of the Siouan tribes. Such names are never used in ordinary conversation. This is especially the case in tribes where the secret society continues in all its power, as among the Osage, the Ponka, and the Kansa. When the author was questioning these Indians he was obliged to proceed very cautiously in order to obtain information of this character, which was not communicated till they learned about his acquaintance with some of the myths. When several Dakota delegations visited Washington he called on them and had little trouble in learning the names of their gentes, their order in the camping circle, &c., provided the interpreters were absent. During his visit to the Omaha, from 1878 to 1880, he did not find them very reticent in furnishing him with such information, though he was generally referred to the principal chief of each gens as the best authority for the names in his own division. But he found it very difficult to induce any of them to admit that the gentes had subdivisions, which were probably the original gentes. It was not till 1880, and after questioning many, that by the merest accident he obtained the clew from the keeper of a sacred pipe. The Iowa, who have these social divisions and personal names of mythic significance, also have sacred songs, but these are in the Winnebago language. It is probable that they are the property of a secret order, as they, too, show how some of the gentes descended as birds from the upper world. The names of the Winnebago gentes and of some members of the tribe have been recorded by the author, who has also learned parts of their traditions. He infers that their secret society has not been abolished. When a man of the Kansa tribe observed that the author had an inkling of the matter he related part of the tradition of that tribe, explaining the origin of the names and the taboos of several Kansa gentes. The ancestors of these gentes were spoken of as birds which descended from an upper world. The phratries in that tribe, the "Wa-yŭn min-’dŭn," or "(Those who) sing together," refer to mystic songs and strengthen the view that the secret society exists among these Indians. Several members of the tribe have positively stated its existence. As one phratry is composed of the two gentes, Large and Small Hañka, that have the sole right to sing the war songs, time may show that these songs, which, with their chart of pictographs(23), are used by the Osage, are substantially those of the seventh degree in the Osage society. This is rendered the more probable by the fact that the Kansa have grouped their gentes in seven phratries, just the number of the degrees in the society. And this arrangement by sevens is the rule among Osage, Kansa, Ponka, Omaha, and Dakota, though there are apparent exceptions.