Note 26 — Chapter II
Reading edition
Maury, Le Sommeil et les Rêves, 1861, pp. 50-77. Good descriptions of hypnagogic imagery are given by Greenwood, Imagination and Dreams, pp. 16-18, and Ladd, 'The Psychology of Visual Dreams,' Mind, 1892. See also Sante di Sanctis, I Sogni, pp. 337 et seq.