The architectural drawings found at "Natirar" at the time the property was acquired by Somerset County, in 2003, include those relating to the original designs by Guy Lowell and Henry J. Hardenbergh between 1910 and 1912, and those relating to the alterations and renovations made in the late 1940s under the direction of York and Sawyer. The drawings are organized by architect, which, in effect, also organizes the drawings by date ranges. Drawings that bear the names of various subcontractors have been organized by subcontractor but are filed with reference to the relevant principal architect. In addition to the drawings pertaining to "Natirar," the collection includes copies of three drawings by architect William Hanford Beers (1856-1932) of the "Gedney Farm" residence of Howard Willets and Mary Macy Willets at White Plains, New York, which was constructed circa 1898 (see photographs of the Willets residence in the July 1901 issue of The American Architect and Building News). William H. Beers' wife, Alice Macy, was a first cousin once removed to sisters Mary Macy Willets and Kate Macy Ladd.