The process of developing truth by patient and persevering investigation, experiment, and research, is incompatible with their notions of unrestrained genius. The drudgery of science they leave to humbler and more unpretending contributors. The flight of genius is, however, frequently erratic.

Experiments and Observations on the Gastric Juice, and the Physiology, of Digestion, Chapter 6 (p. 92), Maclachlan & Stewart. Edinburgh, Scotland. 1838