Which preposition to use with unearthings

of Occurrences 2%

It is to be hoped that no one, who shall become great by means of my rules, will turn upon me and revile me, when he finds himself interviewed incessantly, persecuted by unearthings of his early sins, by persistent beggars, by slanders of the envious, by libels of the press, and by the other concomitants of greatness.

Which preposition to use with  unearthings