... in a sonorous voice... 
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...It was D’Artagnan’s sword, which, slipping from his baldric, had fallen on the sonorous flooring...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...A voice more sonorous than brass or steel resounded within three paces of him...
Alexandre Dumas, Pere 「The Man in the Iron Mask」
...He had wonderfully revived since the day before, held his head high, talked in a full sonorous voice, and ate greedily of all the viands offered him...
(AKA Ralph Iron) Olive Schreiner 「The Story of an African Farm」
...Aloud, sonorous, "cow-cow-cow-cow-cow-cow-cow-cow-cow-uh,cow-uh, cow-uh, cow-uh...
Frank M. Chapman 「Color Key to North American Birds」
...Aloud, sonorous, grating, krrrow, repeated five or moretimes...
Frank M. Chapman 「Color Key to North American Birds」
...A mellow, sonorous coo-c-o-o; a chattering noteuttered when flying, and a short, shrill alarm-note,tzip-tzip...
Frank M. Chapman 「Color Key to North American Birds」
...This Heron derives itsname from its habits, as it is usuallyseen flying at night, or in the earlyevening, when it utters a sonorous cryof quaw or quawk...
Various 「Birds Illustrated by Color Photography [June, 1897]」
...The two bows, the toothed nervures, engage obliquely one with the other,and their mutual friction causes the sonorous vibration of the twostretched membranes...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...Through the gloom came the sonorous chant of many voices...
Various 「Astounding Stories, July, 1931」
...After the meal the green men sought the bunks and soon were stretchedin sonorous slumber...
Various 「Astounding Stories of Super-Science, August 1930」
...As soon as I hear a sound, the tympanum of my ear must be struck by the air put in motion by a sonorous body, which could not act if it was not moved of itself...
Jean Meslier Anna Knoop 「Superstition In All Ages (1732)」
...Their language is extremely grateful to the ear, being in many instances expressive and sonorous...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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