John Haslam,
Observations on Insanity
“ I should define a lucid interval to be a complete recovery of the patient’s intellects, ascertained by repeated examinations of his conversation, and by constant observation of his conduct, for a time sufficient to enable the superintendant to form a correct judgment. Unthinking people are frequently led to conclude that, if during a conversation of a few minutes, a person under confinement shall betray nothing absurd or incorrect, he is well, and often remonstrate on the injustice of secluding him from the world. ”
