'National Digital Archive of Datasets' (an archived site) provides a detailed administrative description
As a legal deposit library the Bodleian has an excellent collection of departmental publications. Early material may not be catalogued or may be difficult to find. Please contact firstname.lastname@example.org for assistance. Material not formally published such as the working papers of a committee will be the remit of the National Archives
In the first instance search SOLO
Other useful catalogues:
COPAC - search over 90 major UK and Irish library catalogues in one go.
WorldCat Search for material worldwide (Single Sign On is necessary for searching outside the University network)
The Foreign Office Confidential Prints and Colonial Confidential Prints
The Foreign Office documents are held on open shelf in the Official Papers section, the Colonial Office prints are available to order to a reading room of your choice.
From the 1820s papers of significance began to be distributed to officials in the Foreign Office, Cabinet and other departments as Confidential Print. The practice grew until the 1850s when nearly every important dispatch or telegram was routinely printed. The Confidential Prints vary in format from a single page to a substantial volume, many have maps (we have over 700) and diagrams. The documents are numbered 1-10,600 (1827-1914) in roughly order of printing.