You might start with the following sources to get background information or to contextualize primary sources:
Victorian Britain : an encyclopedia / Sally Mitchell, editor. LOCATION: AC Frost Reference / DA550 .V53 1988
The Wellesley Index to Victorian Periodicals: 1824-1900 / Walter E. Houghton, editor. LOCATION: AC Frost Reference / Z2005 .H6 [Especially useful if you plan to use British Periodicals.]
When searching for books in the 5 Colleges Catalog or WorldCat, use the following Subject Keywords to get started, and narrow down your search with appropriate keywords:
Great Britain History Victoria, 1837-1901
Great Britain History 19th Century
Great Britain Social Conditions 19th Century
See, for example, a slightly more complicated search:
To search for books with illustrations, use 'ill' or 'illus' as a keyword, or search for 'pictorial' or 'illustrations' as a Subject keyword.
Historical Hansard: 1803-2005
Historiacl Hansard provides access to digitised editions of Commons and Lords Hansard, the Official Report of debates in Parliament. There's the Hansard text itself by volume, Lords sittings, Commons sittings and Westminster Hall sittings as well as Written Answers, Written Statements, Lords reports and Grand Committee reports. This site also includes extracted lists of People who are recorded as having spoken, Constituencies, Offices, Acts, Bills and Divisions.
Institute of Historical Research, British History Online
British History Online is the digital library containing some of the core printed primary and secondary sources for the medieval and modern history of the British Isles. Created by the Institute of Historical Research and the History of Parliament Trust, it aims to support academic and personal users around the world in their learning, teaching and research.
British Library - Discovering Literature: Romantics and Victorians
Discover a wealth of original sources spanning the Romantic and Victorian periods, including literary treasures such as original manuscripts, first editions and rare illustrations, alongside historical material such as newspapers, diaries, letters, photographs, and maps.
Print collections
As explained on the Primary Source Research Guide, you can use the 5 Colleges Catalog or WorldCat to identify collections of primary source material. Specific subjects include:
Great Britain History Victoria, 1837-1901 Sources
Great Britain History 19th Century Sources
You might also go to the Advanced Search and start with keywords related to your topic in one search box, and narrow down your search to primary source material by copying and pasting the following into another search box (just make sure the AND option is selected in the drop-down menu between search boxes). "archival resources" or archives or correspondence or diaries or interviews or notebooks or sketchbooks or "personal narratives" or photographs or sources or speeches
British Library Images
Images from within the Library’s digitised collection of over 65,000 books from the 17th, 18th and 19th centuries.
British Museum Image Service
There are currently 2,156,677 records available, which represent more than 3,500,000 objects. 866,236 records have one or more images. Be sure to note the Advanced Search Options.
Victoria & Albert Museum: Search the Collections
Search the Collections is a working database providing online access to over 1.1 million catalogue records and over 293,000 images of objects in the Victoria & Albert Museum collection.
Yale Center for British Art
Collection of British art from the Elizabethan period to the present day, including paintings, sculpture, drawings, prints, rare books, and manuscripts.
Smithsonian Institution Collections Online
works from the collections within the broad categories of Art & Design, History & Culture, and Science & Technology