Which preposition to use with woolsacks

at Occurrences 1%

Bad taste, because we can't all sit on Woolsack at once; and mention of it excites feelings of emulation, almost of animosity, towards other new-fledged Barristers.

from Occurrences 1%

The lord chancellor, Lord Eldon, had been seated on the woolsack from nearly the beginning of the century, and was the "keeper of the king's conscience" for twenty-five years, enjoying his great office for a longer period than any other lord chancellor in English history.

in Occurrences 1%

The presence chamber was about forty feet square, showy and handsome: round the walls were placed sofas, which, from being covered with scarlet, reminded me of the woolsacks in the House of Lords.

of Occurrences 1%

At Ascot, do you recollect the girl told me I was to be Lord Chancellor of England, and a duke besides?" "Well, Dick," rejoined Sir Wynston, merrily, "if both are to be fulfilled, or neither, I trust you may never sit upon the woolsack of England.

without Occurrences 1%

On entering the House, he is described to have appeared abashed and pale: he passed the woolsack without looking round, and advanced to the table where the proper officer was attending to administer the oaths.

Which preposition to use with  woolsacks