Visiting Professor Keith (Kings College, London, UK) Hamilton 
Servants of Diplomacy [PDF ebook] 
A Domestic History of the Victorian Foreign Office

Servants of Diplomacy offers a bottom-up history of the 19th-century Foreign Office and in doing so, provides a ground-breaking study of modern British diplomacy. Whilst current literature focuses on the higher echelons of the Office, Keith Hamilton sheds a new light on the administrative and social history of Whitehall which have, until now, been largely ignored.
Hamilton”s examination of the roles and actions of the Foreign Office”s domestic staff is exhaustive, with close attention paid to: the keepers of the office, keepers of the papers, the carriers of the papers and the efforts made to adapt to growing technological changes. Hamilton”s exhaustive analysis also focuses on the reforms of 1905-06 and the Queen”s Messengers during wartime.
Drawing extensively from Foreign Office and Treasury archives and private manuscript collections, this is essential reading for anyone with an interest of British diplomatic history.