In the preface to the _Life of Lord Keeper Guilford_, by Roger North, it
appears that Dudleys youngest daughter of Charles, and granddaughter of
Dudley Lord North, dying,--
"Her library, consisting of a choice collection of Oriental books, by
the present Lord North and Grey, her only surviving brother, was given
to the parochial library of Rougham in Norfolk, where it now remains."
This library then existed in 1742, the date of the first edition of the
work.