Which preposition to use with warily

at Occurrences 1%

He had accepted her warily at first until he had proved to his own satisfaction the disinterestedness of her regard and then he had given her his friendship without reserve, his first real friendship with a woman of the world, conscious of the charm of their relation from which all sentiment had been banished.

to Occurrences 1%

Having already passed over the greater part of Arcadia, one day, going to repose himself in a little wood, he saw a fair lady walking with her side towards him, whose sword interested her to be an Amazon, and following her warily to a fine close arbour, he heard her sing, with a voice no less beautiful to his ears than her goodliness was full of harmony to his sight.

Which preposition to use with  warily