She was one of the most perfect singers I ever heard, and suggests to my memory the quaint praise of the gypsy vocal performance in the ballad of "Johnny Faa"- "They sang so sweet, So very complete," She was the first Rosina I ever heard who introduced into the scene of the music-lesson "Rhodes Air," with the famous violin variations, which she performed by way of a vocalise, to the utter amazement of her noble music-master, I should think, as well as her audience.
"Records of a Girlhood"
Frances Ann Kemble
Suddenly, while beneath the vault of the choir a Gregorian vocalise trickled down, the jubilant song gushed forth, and out from the shadows emerges the little shivering form of the lark that swims on the sea of light without shore....
"Pierre and Luce"
Romain Rolland
Those which were brooding, as they flitted over the nests or clung to the edges, uttering a peculiar note hard to vocalise.
"My Tropic Isle"
E J Banfield