Which preposition to use with titterings

from Occurrences 3%

Especially was she interested in Eugenie, and as the subject was one upon which I was equally interested in talking it ended in a rhapsody upon my part, amid little sympathetic ejaculations from the Empress and titterings from Madame de Remusat.

of Occurrences 2%

However, men, women, and children do not see with angelic eyes, and the titterings of her fellow-pupils were irrepressible; one bouncing girl nearly choked herself with her hand-kerchief trying not to laugh, and two or three did not even try.

among Occurrences 1%

Then the front parlor was darkened and, after the consequent tittering among the younger set had died away, Eustace threw his pictures upon a hanging sheet and delivered his agreeable lecture about them, beginning with the exciting trip from Jaffa to Jerusalem.

behind Occurrences 1%

Meanwhile the grandmother and granddaughter were roused from the mute astonishment in which they were gazing after the young cavalier by a tittering behind them; and a pair of bright eyes looked out upon, them from beneath a bundle of long, crimson-headed clover, whose rich carmine tints were touched to brighter life by setting sunbeams.

Which preposition to use with  titterings