Which preposition to use with unconvinced

of Occurrences 4%

" His opinion respecting the safety of inoculating for the small-pox at a proper age, as it was expressed in the following letter to the writer of these pages, will be satisfactory to such parents as are yet unconvinced of the efficacy of vaccination; and his opinion is the more valuable, because it was given at a time when there was neither prejudice nor prepossession on the subject.

by Occurrences 1%

But I remain unconvinced by the modern theories, plausible as they are, and weighty as is their authority; and hence I have presented the greatest man in the history of the Jews as our fathers regarded him, and as the Bible represents him.

in Occurrences 1%

Perhaps no picture has been so strongly championed by an enthusiastic writer as has been this "Shepherd" by Mr. Berenson, who strenuously advocates its title to genuineness.[60] Nevertheless, several modern authorities remain unconvinced in presence of the work itself.

Which preposition to use with  unconvinced