Halftone

That animals utter musical notes is familiar to every one, as we may daily hear in the singing of birds. It is a more remarkable fact that an ape, one of the Gibbons, produces an exact octave of musical sounds, ascending and descending the scale by half-tones; so that this monkey “alone of brute mammals may be said to sing.”

Before leaving New York a handsome booklet had been prepared and printed. The brochure contained the names of the commissioners, their public records, halftone portraits and a carefully prepared statement of the objects of the expedition.

“No, I cannot enjoy it,” Cecilia said to Mrs. Devereux; “I don't mind the grey light; cloud and water, and half-tones of colour, are homely English and pleasant, and that opal where the sun should be has a suggestiveness richer than sunlight.[…]”