Which preposition to use with continuators

of Occurrences 9%

If Ariosto had despaired of equalling Boiardo, he must have been hopeless of reaching posterity, in which case his silence must have been useless; and, in any case, it is clear that he looked on himself as the continuator of another's narration.

in Occurrences 1%

The Minnesingers have found heirs and continuators in the modern writers of Germany.

Which preposition to use with  continuators