423.)] [Footnote 61: _Elemens de la Philosophie de Newton_, Pt.II.ch.

vii.
Berkeley himself only refers once to Cheselden's case: _Theory of Vision vindicated_, Sec.71.Professor Fraser, in his important edition of Berkeley's works (i.

444), reproduces from the _Philosophical Transactions_ the original account of the operation, which is unfortunately much less clear and definite than Voltaire's emphasised version would make it, though its purport is distinct enough.] [Footnote 62: _Essai sur l'Origine des Connaissances humaines_, I.Sec.

6.] [Footnote 63: _Let.

sur les Aveugles_, 323, 324.