Which preposition to use with ambered

in Occurrences 1%

Black letter, early printed, first editions Elizabethan and Victorian, every poor fly ambered in large paper, etc. etc.; in short, he ran through the gamut of that craze which takes its turn in due time with marbles, peg-tops, beetles, and foreign stampswith probably the two exceptions of Bewick, for whom he could never batter up an enthusiasm, and 'facetiae.'

Which preposition to use with  ambered