1. Stock books and ledgers 1199/1-6, including Armitage Papers 1208;Birley Cardwell;John Rylands Library Nathaniel Dugdale (ibid, and WP 1200
2. John Rylands Library Boulton and Watt; Boulton and Watt archive;John Rylands Library Mcconnel Kennedy;The Ten Hours Movement in 1831 and 1832: Six pamphlets and One Broadside,1832
3. Financial Restraints on the Growth of Firms in the Cotton Industry, 1790-1850;S D Chapman;The Economic History Review,1979