It has already been necessary to refer to the unfortunate results which may follow the ignorance of husbands (see, e.g., "The Sexual Impulse in Women," vol. iii of these Studies), and will be necessary again in Ch. XI of the present volume.
Pepys, Diary, ed. Wheatley, vol. vii, p. 10.
Lombroso and Ferrero, La Donna Delinquente; cf. Havelock Ellis, Man and Woman, fourth edition, p. 196.