Drafts, research notes and correspondence relating to various aspects of the career and life of Professor Theodore Barker, [1950-2000]; including correspondence and papers regarding the glass manufacturing industry, most notably the companies Pilkington and Triplex, airports and research material relating to various aspects of transport history, including correspondence with the Transport History Research Trust. Also includes research material concerning St Helen's, Liverpool, used by Barker in preparation for his PhD thesis and later publication on the area. The papers also contain various conference material and drafts and offprints of papers by Barker and others.

Minute book of the National Society of Plate Glass Silverers, Siders, Cutters and Fitters, 1895-1903, particularly references to London, Belfast and Dublin branches [records for 1896-1897 are missing]. Volume also includes Rules of the Amalgamated Plate Glass Workers' Trade Union [c1893] and printed resolution of the Union, against hiring agreements.