Which preposition to use with boscages

of Occurrences 1%

" In Aubrey's posthumous work on Surrey, published in 1718, the northern part of the hill is described as thickly covered with yew-trees, and the southern part with "thick boscages of box-trees," which "yielded a convenient privacy for lovers, who frequently meet here, so that it is an English Daphne."

Which preposition to use with  boscages