Mr. THOMAS was chiefly occupied during the year in the preparation of the second and third volumes of his reports upon the mounds. He also prepared a bulletin on the Circular, Square, and Octagonal Earthworks of Ohio, with a view of giving a summary of the recent survey by the mound division of the principal works of the above character in southern Ohio. A second bulletin was completed, entitled “The Problem of the Ohio Mounds,” in which he presented evidence to show that the ancient works of the state are due to Indians of several different tribes, and that some, at least, of the typical works were built by the ancestors of the modern Cherokees. Mr. REYNOLDS after his return from the field was engaged in the preparation of a general map of the United States, showing the area of the mounds and the relative frequency of their occurrence. He also assisted Mr. Thomas in the preparation of the monograph upon the inclosures. Mr. VICTOR MINDELEFF, assisted by Mr. Cosmos Mindeleff, was engaged in preparing for publication a “Study of Pueblo Architecture” as illustrated in the provinces of Tusayan and Cibola, material for which he had been collecting for a number of years. This report has appeared in the Eighth Annual Report of the Bureau. Mr. COSMOS MINDELEFF with the force of the modeling room at the beginning of the fiscal year completed the exhibit of the Bureau for the Cincinnati Exposition, and during the early part of the year he was at Cincinnati in charge of that exhibit. Owing to restricted space it was limited to the Pueblo culture group, but this was illustrated as fully as the time would permit. The exhibit covered about 1,200 feet of floor space, as well as a large amount of wall space, and consisted of models of pueblo and cliff ruins, models of inhabited pueblos, ancient and modern pottery, examples of weaving, basketry, etc.; a representative series of implements of war, the chase, agriculture, and the household; manikins illustrating costumes, and a series of large photographs illustrative of aboriginal architecture of the pueblo region, and of many phases of pueblo life. Upon Mr. Mindeleff’s return from Cincinnati he resumed assistance to Mr. Victor Mindeleff upon the report on pueblo architecture, and by the close of the fiscal year the two chapters which had been assigned to him were completed. They consist of a review of the literature on the pueblo region and a summary of the traditions of the Tusayan group from material collected by Mr. A. M. Stephen. Work was also continued on the duplicate series of models, and twelve were advanced to various stages of completion. Some time was devoted to repairing original models which had been exhibited at Cincinnati and other exhibitions, and also to experiments in casting in paper, in order in find a suitable paper for use in large models. The experiments were successful.