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This collection is made up of a letter, drawings, maps, and newspaper clippings related to David Wyrick's discovery of inscribed stones in a Native American burial mound near Newark, Ohio, in 1860.

This collection is made up of a letter, drawings, maps, and a newspaper clipping related to David Wyrick's discovery of inscribed stones in an Indian burial mound near Newark, Ohio, in 1860. The items were once bound together under the title "Hebrew Inscriptions alleged to have been dug up in Ohio, U.S.A." Wyrick wrote an 8-page letter to William Brockie, editor of The Sunderland Times, on September 8, 1860, about his archaeological exploits. He recounted his actions on June 29, 1860, the day of his discovery, describing the Newark burial mounds and the Hebrew-inscribed "Keystone" he discovered there. Wyrick addressed the possibility that he had been the victim of a hoax, but ultimately expressed his belief that the stone was a genuine ancient artifact, possibly a relic of one of the Lost Tribes of Israel. His letter also refers to the draining of a nearby artificial pond, the durability of the logs located on its floor, and the discovery of several skeletons in a burial mound.

Wyrick's letters contain references to enclosed drawings and maps (which are present in the collection). Four colored drawings include two- and three-dimensional views of each of the Keystone's four inscribed faces, a diagram of the burial mound where Wyrick unearthed the artifact, and a cross-section of a mound containing several skeletons. Three of the manuscript maps are overhead views of the Newark earthworks, including copies of maps by Caleb Atwater (1820) and Squier and Davis (1848), and Wyrick's own detailed map (1860). A final manuscript map is a view of an artificial lake near Utica, Ohio (undated). Some of the visual materials have lengthy captions written on the verso.

The final items in the Wyrick collection are two newspaper clippings published in The Sunderland Times on October 6, 1860, regarding the Wyrick excavation. One article reprints several lengthy quotations from Wyrick's letter to William Brockie, and the other contains translations of the stone's Hebrew inscriptions.

This collection contains correspondence, documents, financial records, reports, and other items pertaining to Gilbert L. Thompson. The material relates to Thompson's work as the United States Navy's chief engineer from 1842-1844, and his involvement in the coal and transportation industries in the mid- to late 19th century.

This collection (1 linear foot) contains correspondence, documents, financial records, reports, and other items pertaining to Gilbert L. Thompson. The material relates to Thompson's work as the United States Navy's chief engineer from 1842-1844, and his involvement in the coal and transportation industries.

The Correspondence series (155 items) is mostly made up of incoming business letters to Gilbert L. Thompson; outgoing drafts by Thompson and business letters between other persons are also present. The first group of items concern Thompson's service as the United States Navy's chief engineer from 1842-1844, addressing many topics related to naval engineering and United States Navy vessels. The remaining correspondence, dated 1850-1861 and 1865-1872, largely pertains to Thompson's business interests and his stake in various ventures. Thompson wrote and received letters about coal and oil industries, railroads, domestic commerce, and attempts to establish regular steamship trade between the United States and Europe after the Civil War. Many of the latter items pertain to the Norfolk and St. Nazaire Steam Navigation Company and to commerce in the South during the early years of Reconstruction. Thompson's prominent correspondents included Secretary of the Treasury Walter Forward, Secretary of the Navy Abel Parker Upshur, and Virginia governor Francis Harrison Pierpont.

The Documents series is divided into two subseries. The Legal Documents (34 items), which include copies of legislation, by-laws, indentures, and other items, pertain to naval engineering, transatlantic trade between the United States and Europe, and Gilbert L. Thompson's business affairs. Several items relate to the Norfolk and St. Nazaire Steam Navigation Company and to the American Iron Shipbuilding, Mining, and Manufacturing Company. One indenture relates to land that Thompson and his wife owned in Fairfax County, Virginia, and includes a manuscript map of the property (December 13, 1844). Financial Documents (14 items) are made up of accounts and other items pertaining to the Western Virginia Coal Company, the Coal Oil and Paraffin Company of Baltimore, steamship construction and operation, the USS Missouri, and other subjects.

Reports and Drafts (53 items) pertain to the Norfolk and St. Nazaire Steam Navigation Company, steam boiler explosions, coal lands in Pennsylvania and Virginia, the United States Navy, and transportation. Some memorials addressed to the United States Congress mention relevant legislation.

The Notes and Drawings series (90 items) contains technical drawings, manuscript maps, and notes about steam engines, mining and drilling equipment and practices, and other subjects.

Three Newspaper Clippings from the early 1870s concern the Chesapeake and Ohio Canal, a property dispute involving General Bradley T. Johnson, steamships, and the sale of an iron furnace.

This volume, compiled in the 1820s, contains an encyclopedia article, extracts and writings, diagrams, tables, and newspaper clippings pertaining to the design and construction of canals.

This volume (450 pages), compiled in the 1820s, contains extensive information on the design and construction of canals. The first few pages include a manuscript subject index. Pages 1-155 consist of a printed encyclopedia article about canals, bound directly into the volume. Other articles and fragments of articles are included, including the entire entry for "Canada."

The remaining pages consist of manuscript extracts, writings, and notes about canals, illustrated with colored diagrams and drawings. The volume includes sections about types of locks; tunnels; drawbridges; excavation; building materials, labor, and costs; water supply; the effects of rain and evaporation on canals; and hydraulics. Sections focus on canals in the United States, England, Wales, and France. The manuscript contains tables of data about the number and length of canals in each country. Specific structures, such as the Ohio & Chesapeake Canal, Union Canal, and Erie Canal are described and used as examples throughout the text. Illustrations include diagrams of locks, tunnels, and canals; a depiction of a method for burrowing out soil using a horse and several workers (p. 370); and a map of France highlighting its canals (p. 424). Notes, newspaper clippings, and additional drawings are laid into the volume.

The Zaccheus Brown notebook contains information compiled between 1782 and 1783 on arithmetic, sailing and navigation, and surveying, as well as a log of the Phoenix's voyage from New Jersey to the Virgin Islands in 1789. Mathematical and navigational problems are often illustrated with diagrams, and the volume also contains an example of a Mercator chart of the Caribbean.

The Zaccheus Brown notebook (175 pages) contains information on arithmetic, sailing and navigation, and surveying, as well as a log of the Phoenix's voyage from New Jersey to the Virgin Islands in 1789.

The first 112 pages, compiled from 1782-1783, are comprised of information about mathematics and sailing and contain a brief ship's log. Mathematical subjects include square and cube roots, geometry, and plane trigonometry; Brown copied and solved mathematical problems, which are often illustrated with diagrams. Instructions for aiming cannons appear in the section about trigonometry. Brown also described sailing methods such as plane, traverse, oblique, Mercator, parallel, middle latitude, and current sailing, as well writing instructions for turning a ship windward and for determining location. The parts of the volume concerning sailing also contain problems, diagrams, and an example of a "Plane Chart" and "Mercator's Chart." The Mercator's chart shows the locations of islands in the northern Caribbean Sea. The notebook's other subjects include the compass, calculating the phases of the Moon, and the Gregorian calendar. A final section pertains to surveying.

Zaccheus Brown's notebook also contains logs concerning the voyage of the Endeavour (9 pages) and the schooner Phoenix (58 pages). The Endeavour log, attributed to "L. H," notes the ship's journey "from the Cape" in late June and early July 1783. The Phoenix log details Brown's voyage from June 17, 1789-September 1, 1789 from Salem, New Jersey, to the Virgin Islands and back to Virginia. Some of Brown's daily entries about his voyage on the Phoenix include charts recording the ship's course and position, along with additional remarks on wind speed and direction. Brown occasionally discussed other aspects of his voyage, such as the pidgin language spoken by the ship's Dutch crew and his premonitions after bad weather and delays. He also described the port and the island of Saint Thomas, a Dutch colony (currently part of the United States Virgin Islands).

The volume contains illustrations of a man in the sun, a compass rose, and a fish and man; the latter drawings are flourishes on the heading for the section of the book on cube roots. The back endpaper includes a table of angles related to navigation.