1. Morgan De op. cit. (note 1) 172.
2. De Morgan Augustus & Smyth W. H. 26 June 1848 De Morgan Papers MS913/A/2/5 University of London Library.
3. Anon An History of the Instances of Exclusion from the Royal Society… with Strictures on the Formation of the Council and Other Instances of the Despotism of Sir J. Banks Debrett London 1784 17 On this earlier threat to secede from the Royal Society see J. L Heilbron ‘A mathematician's mutiny with morals’ in World changes: Thomas Kuhn and the nature of science (ed. Paul Horwich) pp. 81–129 MIT Press Cambridge MA (1993).