and Valentine Property. 1836; Land Takings Map #57: including property of L. Wells, corner Post Road and Tuckahoe Rd., 1836 Ink and watercolor on paper Reproductions, courtesy of Westchester County Archives, Andrew J. Spano, County Clerk Fayette B. Tower. Over Railroad to Mr. Harvey's Marble Quarry, Hastings, c.1842 Ink with watercolor wash on paper; /V"'* 67" inches Mrs. Helen Tower Wilson David B. Douglass, Land Takings Map #49: including Harvey's Marble Quarry, 1836 Ink and watercolor on paper; 16V'>x 22V'» inches Courtesy of Westchester County Archives, Andrew J. Spano. County Clerk Section of the Aqueduct with Iron Lining, c. 1837-39 Ink and watercolor on paper; 14^4 x 17 V2 inches Jervis Public Library. Rome, NY, drawing #205 Possibly by John B. Jervis. Croton Aqueduct — Detail of Iron Pipes, c.1839-40 Ink and watercolor on paper; 2OV2X 28 V2 inches Collection of ESL Information Services. Engineehng Societies' Library. New York, NY Iron Pipe (sample section). mid-19th century Cast iron; 14 x 6V2X 4 inches Courtesy of the Putnam County Historical Society, Cold Spring, NY Thomas K. Wharton (1814-1862), Works of the West Point Foundry from the Head of the Ravine (Cold Spring, New York), November 1832 Ink on paper in "Thomas K. Wharton Diary 1830-1834 (p.205) Reproduction, courtesy Rare Books and manuscripts Division, The New York Public Library. Astor, Lenox and Tilden Foundations An improved Map of the Hudson River, with the Post Roads between N. York and Albany, Published by Harper & Bros., drawn & engraved especially for the tourist, 1836 Engraved map from unknown guidebook; 6 x 41 inches Briarcliff Manor-Scarborough Historical Society Details of a Device to Move Stone, c.1837 Ink and watercolor on linen-backed paper; 26^4 x 18^4 inches Jervis Public Library, Rome, NY, drawing #87 Theophilus Schramke, Croton Aqueduct. Method of Tunneling in Earth (two men at work), c. 1837-1846 Ink and watercolor on paper; 18 x 16 inches Collection of ESL Information Services. Engineering Societies' Library, New York, NY Method of Construction on steep side hills (Tarrytown Division). c.1837-39 Watercolor and ink on paper; 17 x 25 inches Jervis Public Library. Rome. NY. drawing #199 Harlem River Bridge/Pile Driver. c.l839 Ink and watercolor on linen-backed paper; 24V2X 32 V2 inches Collection of ESL Information Services, Engineering Societies' Library, New York, NY Edmund French, Resident Engineer, Articles furnished by the Water Commissioners and placed under the care of the Chief Engineer (Sing Sing Office), Oct. 28, 1836 Manuscript. Jervis Public Library. Rome. NY Inventory Articles belonging to the Offices of the Northern Division, N.Y.W.W Manuscript Jervis Public Library. Rome. NY Andrew Meneeley's Manufacturing Establishment ... Levelling and Surveying Instruments .... West Troy. NY Printed advertisement, on which is written a letter to J.B. Jervis from Meneely. dated February 1. 1842 Jervis Public Library, Rome, NY Field Lapdesk, (used on the Delaware and Hudson Canal project) Wood; 13^4 X 16 X 12 V4 inches Delaware and Hudson Canal Historical Society, High Falls. NY Gift of Mrs. Percy Ewen Smith. NJ Note: The engineering instruments listed below are representative types from the period, similar to those which would have been used on the Croton Project. Surveyor's Transit (used on the Delaware and Hudson Canal project), c.1822 Brass, glass, blue steel. 2 level vials; 20 x 17 x 8V2 inches Delaware and Hudson Canal Historical Society, High Falls Gift of Mrs. Virgil DeWitt, New Paltz, NY Andrew Meneely, West Troy, NY, Surveyor's Vernier Compass in Wooden Case, c. 182 5-49 Brass, glass, blue steel. 1 level vial, wood; 3 x 16 x 7 inches New York State Museum, Albany. NY. 42.3.1 Meneely & Oothout. West Troy. NY. Surveyor's Compass In Wooden Case (no. 973). c. 1825-49 Brass, glass, blue steel. 2 level vials, wood; 37" x 15^4 x 7V8 inches New York State Museum, Albany. NY. 69.55. A-D W & S Jones, 30 Holborn, London. Surveyor's Brass Y-level (used in the construction of the Erie Canal), c.1820 Brass, glass, level vial, wood; 6 x 25V4 x 3V2 inches New York State Museum, Albany, NY, 46.2.1 a & b Fayette B. Tower. Worker's Camp (building through trees) Ink with wash on paper Mrs. Helen Tower Wilson Engineers' Quarters, in a Work Camp, Old Croton Aqueduct Project Drawing in letter; Fayette B. Tower, from Sing Sing, to his mother, Mrs. D. T. Tower. Waterville, NY, November 5, 1837 Mrs. Helen Tower Wilson General Improvement and Repairs of work on part of the ... Croton Aqueduct, 1847 Accounting sheets by division, signed by division supervisors (overseers), listing workers involved Ink on paper; each 6^4 x 15^4 Inches Courtesy of William Lee Frost William St. John Harper (1851-1910). Shutting off the Croton at the Central Park Reservoir Wood engraving from Harper's Weekly, November 12. 1881 Courtesy of William Lee Frost Checklist Repairing the BrokM PIpee, 5th Avemw at 6Sth Street Wood engraving (tinted)