Which preposition to use with pigeonholes

of Occurrences 4%

If it's Farnham's cheque you are worrying about, here it is," he added, drawing an oblong slip of paper from the pigeonhole of his desk, tearing it in two, and throwing it into the waste-paper basket.

at Occurrences 3%

He selected a pigeonhole at hazard, and emptied it of several bundles of letters, all neatly bound with tape or faded ribbon and clearly docketed.

in Occurrences 2%

" "Every pigeonhole in my mind will be open at your call!" said the Doge, glowing at the prospect.

Which preposition to use with  pigeonholes