I discovered from a listing of Graduates of Harvard University, Nathaniel received his Bachelors of Arts degree in 1765, he was about 19.
He is buried in the Charter Street Cemetery Salem, where the Latin inscription over his grave is still to be seen. The calculations, transits, etc., for the 1769 edition of the "Essex Almanac" were made by Mr. Ward.
"Ward, Nathaniel Born July 29, 1746 Died October 12, 1768 age 23 years. The son of Miles and Hannah (Hathorne). The inscription on his headstone reads as follows: "In this grave are the deposited remains of Nathaniel Ward AM. Late librarian of Harvard College, whom penetrating genius, improved by extensive Acquaintance, with liberal arts and sciences rendered superior to most; his native good sense, and literary accomplishments, attracted universal notice, while amiable disposition, and social virtues, especially his singular frankness and dissembled benevolence, gained him esteem and love of all. He was a dutiful son and affectionate brother, a faithful friend and agreeable companion. Sincere toward God, crowned his other virtues, and promised a life eminencely useful, but blasted hope. In vigor or youth amidst happy prospects, cut off by raging fever. He breath forth his soul October 12 in the year 1768 aged 23." From: Carlson, William Compiler. Charter Street Cemetery Burial Records: Salem, Massachusetts. Salem, MA: Higginson Book Co., 2009. Page 59.
His parents outlived Nathaniel by 24 or more years.
Nathaniel was the great-granduncle of William Frederick Poole, one of the most well-known of all Librarians in America.
Once the weather turns warm, I'll locate Nathaniel's stone, read, compare the inscription to the above, and take photos.