Which preposition to use with baluster

of Occurrences 3%

Her dress she knew to be perfect, and when she perceived the craning pale face of the inevitable lady-journalist, peering between the balusters of a gallery, she thoughtfully took up a prominent position immediately beneath that gallery, and slowly turned round like a beautifully garnished joint before the fire of cheap publicity.

on Occurrences 2%

"Ah, you won't make her 'ear," said a woman, thrusting an untidy head over the balusters on the next landing.

to Occurrences 2%

He glanced at her inquisitively, but she went up the steps, one hand extended over the baluster to his, laughing mischievously.

in Occurrences 1%

Two young girls, respectively about fourteen and fifteen, were craning necks out of nightdresses over the balusters in a shadowy angle of the staircase.

Which preposition to use with  baluster