of his original plans for many features in Wentworth House and Park. As with virtually all the great South Yorkshire families, collieries played an important part and are well represented in the Fitzwilliam muniments, up to and including the extensive opencast working on the estate during the last thirty years. Duke of Norfolk's Arundel Castle Manuscripts Archives of more exclusively estate interest are the Duke of Norfolk's Sheffield, Worksop, and Derbyshire estate archives (Arundel Castle manuscripts). The Dukes of Norfolk and their predecessors the Earls of Shrewsbury were lords of the manor of Sheffield (as the present Duke still is), of Worksop, and of Glossop and Glossopdale in Derbyshire. The manuscripts include detailed accounts and rentals (including the Shropshire estates) for the late Elizabethan period. The Sheffield archives are extensive, their main interest lying in the urban development of Sheffield in the eighteenth and nineteenth centuries, including collieries and markets. There is a series of the Sheffield agents' letters and diaries in the nineteenth century. The Worksop records cover in particular the eighteenth century when Worksop was a residence of the dukes. The Glossop records also refer mainly to the nineteenth century when the town became a prosperous manufacturing district and there are records of several turnpike trusts of the Glossop area. Wharncliffe Papers The Earls of Wharncliffe, the Vernon-Wentworths and the Spencer Stanhopes have also deposited their records. Besides estate matters in Scotland, Yorkshire and (a few) Cornwall, they include much correspondence. The small number of letters from Lady Mary Wortley Montagu (about 40 in all) have been published by Professor R. Halsband, in the Complete Letters of Lady Mary Wortley Montagu. A much more extensive group of letters forms basically the correspondence of the first Baroness Wharncliffe and her family, including her mother Lady Erne and her grandfather the 4th Earl of Bristol and spanning the years 1773 to 1845. Much is merely personal but much also concerns the political affairs in which Lord Wharncliffe was involved in the period c. 1820 - 1845, as a Tory. This correspondence remains as it was arranged by Lord Stuart of Wortley when he was preparing, with Caroline Grosvenor, the biography of The First Lady Wharndiffe, which was published in 1927. This work makes limited use of the letters. There is also a run of typed transcripts, made for Lord Stuart of Wortley, which includes originals no longer available. Secondly, there