Which preposition to use with instigator

of Occurrences 67%

General Carr, upon hearing of the row, sent for Wild Bill and myself, he having concluded, from the various statements which had been made to him, that we were the instigators of the affair.

to Occurrences 4%

But a retribution subtler than mere drowning awaited the superfluous Potts; a retribution so simple of mechanism, so swift, so potent, and wrought with a talent so masterly, that the right of its instigator to the title of Boss of Little Arcady seemed to be unassailable for all future time.

for Occurrences 1%

Beyond a doubt they will make themselves the secret instigators for an intervention of their country in the Balkan conflict.

Which preposition to use with  instigator