During his period as Mayor of Marlborough a collection of valuable 17th century books were discovered in Marlborough Town Hall. The Marlborough Vicar's Library was bequeathed to the town by Rev William White in 1678 for the use by the Vicar of
St Marys. The oldest book was published in 1487 and 237 items were printed in Britain before 1641, of which 8 are the only known copies and another 45 are rare. Most of the 600 volumes are theological, works of scholarship and school books. They include 13 specimens of the grammatical treatises of
Robert Whittington and a volume of 5 tracts by
John Stanbridge (of which 4 are unique). Classics, literature, political tracts, history, law and medicine are also represented. Kempson researched and catalogued the collection. The Vicar's Library was donated on permanent loan to the
Bodleian Library, Oxford in 1985, the Mayors of Marlborough continue to be the collection's trustees. Kempson also held the position of Archivist of Marlborough College, a post that he relinquished in 1986. ==Legacy==