London Books

Scriveners' company common paper 1357-1628 (with a continuation to 1678) Francis W. Steer (editor), 1968 [http://www.british-history.ac.uk/source.asp?pubid=152]
By kind permission of the London Record Society. Records of the 'Writers of the Court Letter', later incorporated in 1616/17 as the Company of Scriveners of the City of London. Includes lists of officers, oaths, ordinances, petitions and letters patent.
pp.20-49: The Common Paper. Subscriptions to the oath 1417-1613
[p.81] John Sprotley, 20 Sept. 1475