[[6]] Part 2, sec. 1, chap. 4.

[[7]] See p. 159.

[[8]] Modern Painters, vol. 1, part 2, sec. 1, chap. 7.

[[9]] Unto This Last.

[[10]] See p. 262.

[[11]] See p. 162.

[[12]] See p. 139.

[[13]] See p. 147.

[[14]] See p. 121.

[[15]] See p. 122.