Trees, observes Mr. Whately, in his elegant treatise on this subject, "which differ in but one of these circumstances, of shape, green, or growth, though they agree in every other, are sufficiently distinguished for the purpose of variety; if they differ in two or three, they become contrasts: if in all, they are opposite, and seldom group well together. Those, on the contrary, which are of one character, and are distinguished only as the characteristic mark is strongly or faintly impressed upon them, form a beautiful mass, and unity is preserved without sameness."* (* Observations on Modern Gardening.)
[Thomas Whately was an English politician and writer, and a Member of Parliament (1761-1768) and the author of Observations on Modern Gardening, illustrated by descriptions (London, 1770), written while living in the Mansion House in Nonsuch Park.]
