Which preposition to use with unclosing

of Occurrences 3%

Deftly he did the few things necessary to restore the swooning woman, noting with a doctor's eye the first faint flush of pink under the dead white nails, then the flutter of breath through the parted lips and the slow unclosing of the hazel eyes which, at sight of him, sprang widely, vividly into life.

before Occurrences 1%

It must unclose before it, revealing to sight and bringing to enjoyment its riches and its depths."

on Occurrences 1%

" Ida had been going to speak, to stop him; but at this appeal she remained silent, standing with her hands closing and unclosing on her whip, her eyes fixed on the ground, her brows drawn straight.

with Occurrences 1%

Midnight? ... or the small hours of the morn?" He spoke quickly, jerking out his words through closed teeth, his eyes burning with inward fever, his fists closing and unclosing with rapid febrile movements of the fingers.

Which preposition to use with  unclosing