Encyclopædia Britannica, Ninth Edition/Newark (1.)
From the large number of Roman remains found in the neighbourhood, from traces of ditches, and from supposed portions of Roman buildings that still exist, some antiquarians suppose that Newark was an important Roman station built to protect the navigation of the Trent, and identify it with the British Ael Tavum, the Roman Eltavona, and the Saxon Sidnacester, which was an episcopal see of Mercia. The balance of probability seems, however, to favour the opinion that Sidnacester was situated in Lincolnshire. The first authentic notice of Newark is during the Saxon heptarchy. The town was partly destroyed by the Danes, but during the reign of Edward the Confessor it was rebuilt. By Leofric, earl of Mercia, the manor of Newark was bestowed upon the monastery of Stow, near Lincoln. The castle and manor were conveyed to the crown by Henry Holbeach, bishop of Lincoln, in the reign of Edward VI., by whom the town was incorporated in 1549. It was created a mayoralty by Charles II. in 1625. It is supposed to have sent members to parliament in the reign of Edward VI., but it is not known how long the privilege had been in abeyance when it was restored by Charles II. in 1625, from which time it has returned two members. Newark is the birthplace of Bishop Warburton; David Hartley taught in its grammar school; and the first volume of Lord Byron’s poems was printed by Ridge, a Newark bookseller.
Of the various histories of Newark the most recent is the beautiful and elaborate volume by Cornelius Brown, Annals of Newark-upon-Trent, 1879.