Papers of Lobeck while he was in Paris as Assistant to the Chief Cartographer of the American Commission to Negotiate Peace. Included are memorabilia, some correspondence, several docuements, and some photographs. The correspondence consists of his letters of appointment from Robert Lansing, Secretary of State, and his postcards to his wife, Bertha Merrill Lobeck, who later joined him in Paris. There are official documents such as passports, Commission memoranda, identification cards, and passes. Of particular interest are sixteen photographs of persons and places in France, and one drawing and one caricature of Lobeck that he sketched. The collection, however, is chiefly memorabilia of Lobeck's crossing the Atlantic on the U.S.S. George Washington with the members of the Commission; over 700 picture postcards, with no messages, of the Lobeck's travels in France, Spain, Great Britain, and other European countries; railway, subway, and bus maps, schedules, and tickets; tourist maps; hotel and restaurant receipts and menus; money; ration coupons; and theater programs.

Architectural drawings and specifications for Codman's projects, circa 1890s-1930s, including the Martha Codman house in Washington, D.C.; alterations for Edith Wharton and her husband at their three residences, the Mount in Lenox, Mass., Land's End in Newport, R.I., and their Park Avenue home in New York City; work for the Thayer family of Boston, Mass., specifically Nathaniel Thayer's three homes in Boston, Lancaster, Mass., and Newport, R.I. ("Edgemere"), Bernard Thayer's Beacon Hill houyse in Boston, and Eugene Van Rensselaer Thayer's two houses in Boston and Lancaster, Mass.; the Lucy Dahlgren house in New York City; the Archer M. Huntington house on Fifth Avenue in New York City; interior design for John D. Rockefeller in his house "Kykuit" at Pocantico Hills, N.Y.; interior design work for the Vanderbilt family including Cornelius Vanderbilt's "Breakers" at Newport, R.I. and Frederick William Vanderbilt's mansion in Hyde Park, N.Y. and his house on Fifth Avenue in New York City; Oliver Ames' mansion at Pride's Crossing, Beverly, Mass., and his house in Boston; and interior decoration and alterations for Codman's own homes in Newport, R.I. and Roslyn, N.Y. and his villa in France, "La Leopolda", at Villefranche-sur-Mer. Also, lists, descriptions, and postcards of French chateaux, with related correspondence, circa 1900s-1930s, relating to Codman's bibliography on the chateaux of France; and miscellaneous lists of houses in England and France, correspondence, and printed material.