Which preposition to use with aigrette

of Occurrences 6%

He had handsome jewels, a large diamond fastening the white aigrette of his high black cap, and his sword-hilt incrusted with diamonds.

in Occurrences 2%

There you sit in a Doucet gown, perfection as ever, from the aigrette in your hat to those delicately pointed shoes.

Which preposition to use with  aigrette