Jérôme Pasquier was a French servant of Mary, Queen of Scots, involved in writing and deciphering coded letters. Working for a captive queen Pasquier is recorded as a groom of the chamber to Mary and master of her wardrobe. The other grooms were Bastian Pagez and Hannibal Stuart. He was described as "young Pasquier". Adam Blackwood described him as "commis et argentier", a clerk and treasurer or purse keeper. The French ambassador also called him a steward or argentier. On 20 March 1586, at Chartley, Pasquier and Bastian Pagez witnessed a document in which Jacques Gervais, Mary's surgeon, placed his affairs in the hands of Jean de Champhuon, sieur du Ruisseau, a brother-in-law of Mary's secretary Claude Nau. Ruisseau was an administrator of Mary, Queen of Scots' French estates. Pasquier worked with Mary's secretaries Claude Nau and Gilbert Curle managing Mary's correspondence. Letters in cipher from the French ambassador London, Guillaume de l'Aubéspine, Baron du Châteauneuf, were delivered to him. In May 1586, Mary said, and Gilbert Curle wrote, that she received an infinite number of letters in cipher. Curle translated Mary's French drafts or dictation into English and ciphered them. Nau was in charge of the French correspondence. In August 1584 Pasquier worked on the deciphering of a long letter to Mary and Claude Nau from Albert Fontenay, a half-brother of Nau, which describes his visit to Scotland and negotiations with James VI. The letter describes the young king and his hobbies and has become an important source for his biography. Pasquier deciphered a letter to Mary in Spanish from Alexander Farnese, Duke of Parma in 1585. Pasquier had a lesser role in Mary's correspondence than Nau and Curle, and the historian Conyers Read thought he was a minor figure in the intrigues leading to her execution. Arrested and questioned As the Babington Plot was investigated and revealed by Francis Walsingham, Pasquier was arrested in August 1586 with Mary's secretaries at the suggestion of Amias Paulet, who observed he was "half a secretary". He was moved to the house of Mr Littleton and the lodging of Thomas Gresley of Drakelow at Chartley. Walsingham told Paulet to send Pasquier to London under "sure guard". Paulet arranged for him to be taken to the Tower of London on 29 August escorted by three men. Pasquier was questioned by Owen Hopton, Edward Barker, and the code expert Thomas Phelippes twice in September