The explanation presented in several former annual reports of the general plan upon which the work of the Bureau has been performed renders a detailed repetition superfluous. The lines of investigation which from time to time have appeared to be the most useful or the most pressing have been confided to persons trained in or known to be specially adapted to their pursuit. The results of their labors are presented in the three series of publications of the Bureau which are provided for by law. A brief statement of the work upon which each one of the special students was actively engaged during the fiscal year is furnished below; but it should be noted that this statement does not specify all the studies made or services rendered by them. The assistance of explorers, writers, and students who are not and may not desire to be officially connected with the Bureau is again invited. Their contributions, whether in suggestions or extended communications, will always be gratefully acknowledged and will receive proper credit. They may be published as Congress will allow, either in the series of annual reports or in monographs or bulletins. Several valuable papers of this class have already been contributed and published. The report now submitted consists of three principal divisions. The first relates to the publications made during the fiscal year; the second, to the work prosecuted in the field; the third, to the office work, which chiefly consists of the preparation for publication of the results of field work, with the corrections and additions obtained from exhaustive researches into the literature of the subjects discussed and by correspondence relative to them. PUBLICATIONS. The publications actually issued and distributed during the year were as follows, all octavo: Bibliography of the Iroquoian Languages, by James C. Pilling; pages i-vi + 1-208. Facsimile reproductions, at pages 44 and 56, of title pages of early publications relating to Indian languages, and, at page 72, of the Cherokee alphabet. Textile Fabrics of Ancient Peru, by William H. Holmes; pages 1-17, Figs. 1-11. The Problem of the Ohio Mounds, by Cyrus Thomas; pages 1-54, Figs. 1-8. FIELD WORK. The field work of the year is divided into (1) mound explorations and (2) general field studies, the latter being directed chiefly to archeology, linguistics, and pictography. MOUND EXPLORATIONS. WORK OF MR. CYRUS THOMAS.