ISAAC VAN ETTEN, Esq., St. Paul.—The original Seal of the Adjutant General of the Territory of Minnesota, and the original Receipt Book, Check Book, and Book of Records of the “Board of Commissioners of Public Buildings,” of the Territory of Minnesota. S. T. RAGUET, Esq., St. Paul.—An autograph letter from Sir Wm. Pepperell, dated January 17, 1731, and a copy of “The First Minnesota,” a paper published by the members of the 1st Regiment, Minn. Vols., at Berryville, Va., March 11, 1862. Dr. J. C. RHOADES, Stillwater.—Specimens of Sulphate of Lime, from west bank of Red River, at Fort Abercrombie. Rev. GIDEON H. POND, Bloomington, Minn.—The Bag used by a Sioux “Medicine-man.” Several works on the Sioux massacre of 1862, have been added by gift and purchase, and twenty-two volumes of Doddsley’s Annual Register, (comprising the whole set with the exception of two volumes,) a journal of the times from 1751 to 1780, published in London, have been purchased and placed in our library. Gen. H. S. Sanford, U. S. Minister at Belgium, an honorary member of the society, and Hon. A. Goodrich, Secretary of Legation at the Belgian capital and an old member of this society, were appointed delegates to the International Archæological Congress to have been held at Antwerp in August last, but which was postponed in consequence of the prevalence of the cholera in that city. Both gentlemen signified their acceptance, presented their credentials and agreed to represent this society at the adjourned meeting of the Congress which is to be held during this year. The society in May last caused two of the mounds on Dayton’s Bluff to be opened. The work was superintended by Mr. W. H. Kelley, who made an able and elaborate report to the society, which proved the mounds to be of very great antiquity. It is contemplated to continue the work of excavation still farther, and it is hoped that discoveries may be made which may throw additional light on the “Mound Builders,”—a race whose history is shrouded in the deepest mystery and oblivion. A vast deal may be accomplished for the furtherance of the objects of the society, which will otherwise remain undone, by standing committees who should be appointed by the council from its members. Biographies, narratives and reminiscences of the early missionaries, fur-traders, voyageurs, government agents, explorers and old settlers, might now, with organized and well directed effort, be easily obtained (while the opportunities for such work are rapidly diminishing,) and would be of incalculable interest to the future historian and antiquary. Although much has been written on the subject of the Indian tribes who have lived within the limits of the state, yet it is a fruitful field that is by no means exhausted. Much remains to be done in the department of geology and mineralogy, in collecting specimens and properly classifying and arranging them.