THETFORD, a borough and market-town, possessing exclusive jurisdiction, though locally in the hundred of Shropham, county of NORFOLK, but partly in the hundred of LACKFORD, county of SUFFOLK, 30 miles (S. W.) from Norwich, and 80 (N.N.E.) from London, containing, according to the last census, 2922 inhabitants, which number has since increased to 3500. This ancient place, called Theodford by the Saxons, evidently derives its name from the river Thet, which, having united its stream with the Lesser Ouse at this spot, the latter passes through the town, separates the two counties, and is navigable hence to Lynn. The majority of antiquaries consider it to be the. site of the celebrated Sitomagits of the Romans, who possessed it in 435, and it is known to have been the metropolis of East Anglia; on which account, and front its proximity to the North Sea, it was frequently, during the Octarchy, desolated by the Danes, who, having retained possession of the town for fifty years, totally destroyed it by fire in the ninth century. In 1004, it sustained a similar calamity from their king, Sweyn, who had invaded East Anglia; and in 1010, it became for the third time the scene of plunder and conflagration by these marauders, into whose hands it again fell, after a signal victory which they had obtained over the Saxons. In the reign of Canute, Thetford began to recover from the effects of these repeated calamities, and, in that of Edward the Confessor, had nearly regained its former prosperity, containing not less than nine hundred and forty-seven burgesses, who enjoyed divers privileges. In the time of the Conqueror, the episcopal see of North Elmham was transferred hither, and hence to Norwich, by Herbert de Losinga, in the following reign j but Henry VIII. made it the seat of a bishop suffragan to Norwich, "which it continued during his reign. From the time of Athelstan to that of John here was a mint, in which coins of Edmund and Canute were struck. The ancient extent and importance of this town may be gathered from the fact that, in the reign of Edward III., it comprised twenty-four principal streets, five market-places, twenty churches, six hospitals, eight monasteries, and other religious and charitable foundations, of all which there are comparatively but few remains. Thetford has been honoured with the presence and temporary residence of several British sovereigns, particularly Henry I., Henry'II-, and Elizabeth, who rebuilt the ancient mansion of the Earls of Warren, on its lapse to the crown, and occasionally resided in it, as did also James I., for the purpose of hunting; and it is still called the King's House. The town, which has of late been much improved, comprises five principal streets, which are partly paved, and is connected with the few remaining houses on the Suffolk side by a handsome iron bridge over the Ouse, erected in 1829: the modern buildings are plain ana neat, and the inhabitants are well supplied with water from wells and springs. Assemblies are occasionally held, a small theatre is open during the Lent assizes. and there is a subscription library. In addition to a very extensive paper-mill, there are, a large iron-foundry, an agricultural machine manufactory, three good breweries, and several malting' establishments. The navigation of the river, in its course to Lynn, having been lately improved between this place and Brandon, a brisk business is carried on in corn, wool, coal, and other articles. The market is on Saturday; the market-house is a neat and commodious building, covered with cast-iron, with a portico and palisades in front. Fairs are held May 14th, August 2nd, and August 16th, for sheep; September 25th, for cattle; and there is a wool fair in July. The charter of incorporation, granted by Elizabeth, in 1573, was surrendered to the crown in the 34th of Charles II., and a very imperfect one obtained in its stead, which, in 1692, was annulled, and the original charter restored, by a decree in Chancery: the municipal body consists of a mayor, recorder, ten aldermen, and twenty common council-men, assisted by a town clerk, sword-bearer, Serjeant at mace, and inferior officers. The mayor is clerk of the market, and, in the year after his mayoralty, acts as coroner; the mayor, coroner, and recorder, are justices of the peace, with exclusive jurisdiction, within the borough, and hold quarter sessions: there is also a court of requests for the recovery of debts to the amount of £50. The county assizes for the Norfolk circuit have been held here, in Lent, ever since the year 1234. The guildhall is a fine old building, erected at the expense of Sir Joseph Williamson, Knt., Secretary of State to Charles II., in which the assizes are held. The gaol is a plain edifice of flint and white brick, commodiottsly arranged, and capable of holding one hundred prisoners; on these buildings many thousand pounds have been expended by the inhabitants. This borough sends two members to parliament: the right of election is vested exclusively in the corporation; the mayor is the returning officer. Thetford comprises the parishes of St. Cuthbert, St. Peter, and St. Mary the Less, all in the archdeaconry and diocese of Norwich, and in the patronage of the Duke of Norfolk. The living of St. Cuthbert's is a dis- charged rectory, with that of the Holy Trinity united", endowed with £200 royal bounty, and £1400 parliamentary grant: the church has a square embattled tower. The living of St. Peter's is a discharged rectory, with that of St. Nicholas' united, rated in the king's books at £5. 1. 5., and endowed with £200 private benefaction, and £200 royal bounty: the church is commonly called the black church, being constructed chiefly of flint; the tower and part of the body of the church were rebuilt in 1789. The living of the parish of St. Mary the Less is a perpetual curacy, rated in the king's books at £1. 13. 6., endowed with £200 private benefaction, arid £200 royal bounty: the church, which stands in the county of Suffolk, has a square tower. There were formerly many more parishes in this town, the churches of which have all been demolished. There are places of worship for the Society of Friends, Independents, Wesleyan Methodists, and Roman Catholics. A free grammar school, and an hospital for two poof men and two poor women, were founded, in the reign of James I., under the will of Sir Richard Fulmerston-, who died in 1566, having bequeathed property for the erection of a free school, and other buildings, with adequate salaries for the master and usher, and remuneration to a clergyman for the performance of certain prescribed duties; it was therefore decreed, by act of parliament, that this should be a free grammar school and hospital for ever, and that the master, usher, and the four poor people, should be incorporated, under the title of " The Master and Fellows of the School and Hospital at Thetford." A National school, in which about one hundred and fifty children are educated, is supported by subscription. Almshouses for six poor men were erected, in 1680, at the expense of William Harbord, Esq., and endowed with £30 per annum for a limited term, which expired about twenty years since, after having been renewed; the inmates participate in the proceeds of a bequest of £30 per annum, left in 1679, by his father, Sir Charles Harbord, Knt., Surveyor- General to Charles I. A certain number of boys and girls, children of the inhabitants, are apprenticed from a fund of £2000, bequeathed by Sir J.Williamson; of this charity, the mayor and corporation appoint the trustees. In 1818, Mr. P. Sterne, of this place, bequeathed £1000 for the benefit of the poor: there are several minor charitable benefactions. The relics of antiquity consist chiefly of fragments of the nunnery, founded in the reign of Canute, by Urius, the first abbot of Bury St. Edmund's; some of the walls, buttresses, ,and windows, with a fine arch and cell, are still visible, the conventual church having been converted into a barn, and a farm-house built with the other ruinous portions. Of the priory, or abbey, founded on the brink of the river, in 1104, by Roger Bigod, for Cluniac monks, which, at the dissolution, was valued at £418. 16. 3., the gateway, constructed with freestone and black flint, and parts of the church, alone remain. Of the monastery of St. Sepulchre, founded in 1109, by the Earl of Warren, and additionally endowed by Henry II., the church has been converted into a barn; and the site of St. Augustine's friary, founded in 1387, by John of Gaunt, for mendicants of that order, still bears the name of Friars' Close: of the rest, no certain traces can be distinguished. At the eastern extremity of the town are remains of an ancient Danish fortification, which consisted of a large keep and double rampart erected on an artificial mount, called Castle Hill, of which the height is one hundred, feet, and the circumference of the summit eighty-one feet, and of the base nine hundred and eighty-four; the remains of the ramparts are twenty feet-high, and the surrounding fosse seventy feet wide: it is somewhat singular, that no trace of any steps, or path, by which military stores could be conveyed up the very steep ascent to the fortress, is visible. Among the various fossils found in the vicinity is a perfect nautilus, which has been deposited in the British Museum. A mineral spring, the properties of which "are similar-to those of Tonbridge, was discovered here, about eighty years ago, by Matthew Manning, Esq. M. D., and about that time much resorted to: it was afterwards shut up for many years; but in 1819 was re-opened, and the waters having been again analysed by the celebrated operative chemist, F. Accum, were found very effectual in strengthening the stomach and alimentary canal. A handsome pump-room was then erected, to which hot and cold baths are attached, the first stone having been laid by the Duke of Grafton: it is situated near the river side, and is approached by pleasant sheltered walks. Thomas Martin, F.A.S., and author of the "History of Thetford," was born here, in 1696, and educated at the free school, of which his father was master, and also rector of the parish of St. Mary. The notorious Thomas Paine, author of the "Age of Reason," "Rights of Man," &c., was also born at a house in White Hartstreet, and educated at the school.