[ 4] See William A. Scott, Money.
[ 5] How We Think.
[ 6] Autobiography, Vol. I, p. 463.
[ 7] Autobiography.
[ 8] Hugh Elliot, The Letters of John Stuart Mill.
[ 9] Essay, Over-Legislation.
[10] The Conduct of the Understanding.
[11] The Will to Believe.
[12] Autobiography.
[13] Science and Education.