This collection includes letters, a diary, photographs, printed matter, souvenirs, etc. of the international geographical trip of the American Geographical Society of New York to the west coast. Included are circulars and bulletins printed and issued along the way.

These field diaries of this collecting trips to the American West provide detailed background information on the geology and precise position in which he uncovered fossils, as well as description of fossils, and Greek names he assigned to them. He sketched geological formations, fossils he discovered, and his conceptions of the way the animal might have appeared in life. One journal covers his trip to Paris in 1892.

This journal was kept by Peale as the assistant naturalist of Stephen Long's expedition west of the Rocky Mountains, May 3-August 1, 1819.

This item is Lewis' narrative journal of the river trip from Pittsburgh to the winter camp of the Lewis and Clark Expedition, together with meteorological observations. There are also entries by William Clark. Of the 126 leaves in this journal, 31 contain questions by Nicholas Biddle, with William Clark's replies, dated 1810. Includes parts II and III of Nicholas Biddle, "Notes on Indians...", and list of measurements of bones and other natural history specimens, in Lewis' hand. Also contains some sketches and two small maps.

These journals were kept while on the Lewis and Clark Expedition (1804-1806).

The collection consists of two volumes. The first notebook, "Notes of Queries to William Clark, with replies," (917.3.L58.b), contains Lewis' journal of the river trip from Pittsburgh to winter camp, August 30- December 12, 1803.

Dalton Dorr (1846-1901) was the curator, secretary and director of the Pennsylvania Museum and School of Industrial Art in Philadelphia, the forerunner of the Philadelphia Museum of Art, from 1880-1899. A journal, written in 1897, copied from his notes and from memory, of travels in Greenland (1869), the Indian Territory, Colorado and the Pacific coast (1872-73); Paris, England, Scotland, and Ireland (1882-85), with some sketches. He took the Greenland cruise with Isaac I. Hayes in 1869, which was described by Hayes in his "Land of Desolation" (New York: Harper, 1872). See also, a companion volume of albumen prints taken by William Bradford and other members of "Under the midnight sun: a pleasure cruise in Greenland" in the summer of 1869.

This collection includes ca. 200 letters to and from Harvey's family, concerning Quakers, the Missouri Compromise, slavery, the depression of 1819-1820. There is also a commonplace book (1819-1820, 1821 Aug.), with observations on a balloon ascension of 2 Aug. 1819 from Vauxhall Gardens in England, slavery, Indians, and descriptions of Washington and Baltimore. There are also journals of trips to Niagara Falls and Canada in 1820 and to the American West, from Baltimore to Louisville and back, with an added description of a voyage around Long Island aboard the Robert Fulton in August 1821.

The manuscripts of father William Mitchell and daughter Maria Mitchell are not easily separated, and are treated here together. The collection includes William Mitchell's autobiography, his memoir of Judge Walter Folger of Nantucket, astronomical and meteorological observations, lectures, family and other correspondence.

This collection includes letters to and from Americans (including South America and the West Indies) and letters about America selected from the Society's manuscripts (Classified Papers, Letter Books, Letters and Papers, Royal Society Letters, Miscellaneous Correspondence, and other official groups) and from collections of private papers (Sir Charles Blagden, William Buckland, John Canton, Sir John F. W. Herschel, Sir Edward Sabine, and others). The documents range in time and character from John Winthrop, Jr., "A Description of the Artifice & Making of Tarr & Pitch in New England" (1662), to letters from Sir Thomas Edward Thorne to his wife describing the American West, where he was on a surveying party in the 1880s.

This is a collection of letters, letterbooks, account books, scrapbooks, etc., concerning the families of Robert Hare and Thomas Willing. The letters and other documents include early family material, as well as documents written by numerous family relations, and some obviously only collected by them. The Willing family letters (1744-1901) are diverse, concerning family matters, business, society, comments on the Civil War, etc. There are numerous letters from Thomas Willing, many concerning his banking career, as President of the Bank of North America and later at the first Bank of the U.S. The Hare family letters (1724-1965) are more extensive and diverse, including much on travel in the U.S. and elsewhere. There is a letter from Robert Hare Jr. concerning steam engines, and letters from Horace Binney Hare concerning his education at Harvard, 1860, his trip to San Francisco and the west, 1862, and numerous letters written while a soldier in the Civil War. There are many letters from Horace Binney (1780-1875, DAB) to his daughter Esther, who was married to John Innes Clark Hare (1816-1905, DAB), concerning family travel and court cases. There are also letters from outside the family, such as those from Dorothea L. Dix. The bound volumes include, among others: Robert Hare letterbooks (1824-1825, 1841-1857), estate records, and laboratory expense accounts (1818-1860); G. H. Hare's journal or log of cruises aboard the U.S. United States (1841) and U.S. Flint (1845); Horace Binney Hare's 1862 journal of his trip to San Francisco. There are account books and accounts (1754-1795) kept by Thomas Willing; accounts of the controversy over the estate of John Innes Clark; and records of the First Colored Wesley Methodist Church of Philadelphia (receipt book, 1820-1848; minute book, 1827-1844). There are also Philadelphia court records, and minutes of the Common Council of the city, 1832.