This collection of Franquetot family papers predominantly dates from the late seventeenth and early eighteenth centuries. It includes about 500 letters.
The earliest letters were sent to Vicomte de Carentan, 1576-84. Commissions addressed to him, 1557 and 1595 (when he was created gentleman of the bedchamber), also survive. His relationship to the de Franquetot family is unclear. A letter signed by Henri IV of France in 1593 relates to a grant of money to le Sieur de Coigny.
There are a number of letters sent to Robert de Franquetot, President à Mortier to the Parlement de Rouen (d 1666). These include letters from King Louis XIV, 1644-75, and other people including ministers. A further two letters to Robert are signed by Anne of Austria [mother of King Louis XIV].
Of particular significance are a large number of letters and papers on military matters, collected by Robert Jean Antoine, Comte de Coigny (1652-1704), and mostly dated 1677-1694. These include autograph letters from King Louis XIV, Louis Duc de Bourbon and Prince de Condé (1668-1710), Monsieur Chamillard, and other ministers at Versailles. There are also printed ordinances from the King dated 1684-87, reports of reviews of regiments, and commissions in the army. Other significant correspondents include Marshall de Tallard and Marshal Villeroy during the Blenheim campaign of 1704; Louis Auguste de Bourbon, Duc de Maine (1670-1736); François Louis de Bourbon, Prince de Conti (1664-1709); and François Henri de Montmorency-Bouteville, duc de Luxembourg (1628-95).
Additionally, the collection includes sixteen autograph letters from Louis XV to Jean Antoine François, Comte de Coigny (1702-1748), and many others signed by him.
Added to the collection in 2012 were a bound volume of 62 letters received by Gustave, 3rd Duc de Coigny (1788-1865), and a series of other miscellaneous family letters dated 1776-1889. The letter dated 1776 is from Elizabeth [Chudleigh], Duchess of Kingston, to the Duke of Portland, written shortly after she was tried for bigamy in the House of Lords.
There is a manuscript account of the campaign of the Duc de Coigny in Italy in 1733-34, probably written by his grandson, Auguste Gabriel de Franquetot, and papers relating to the building or renovation of the Chateau de Coigny in 1728-36.
More general family papers include various marriage contracts, dated 1488-1760, wills (1556-1699), and pedigrees and other notes.
The plight of the family during the French Revolutionary period is represented by just one document, a letter to a member of the family relating to the threat of pillage at Franquetot, 27 July 1789; and is possibly referred to in two further letters dated 1792 (Mc 9/4/55 and Mc 9/4/59).
There were only three items dated after 1789 in the original deposit: a diary kept by the 3rd Duc de Coigny in 1810, during his time on military service in Spain during the Napoleonic wars; accounts of the estate of the Duc de Coigny, 1869, and a copy will of Henrietta, Duchesse de Coigny, 1870.
The material added in 2012 also includes the diary of Jane, Lady Dalrymple-Hamilton (1780-1852), mother-in-law of the 3rd Duc de Coigny, recording her social life in Paris, Brussels and London between 1814 and 1821. The diary includes interesting accounts of the reaction in Paris to Napoleon's invasion of France in 1815, and of the aftermath of the Battle of Waterloo.
There are no original de Franquetot documents dated after 1889 (a letter to Georgine, Countess Manvers). The material added in 2012 includes photocopies of genealogical material relating to the de Franquetot family, 1895-1904; and various 20th century transcriptions and research papers relating to the family and their records.