What do people think of using the construction "both of which [things]" in general, or in academic writing?

Question

For example, from a translation of Proust: "The wind pulled out sideways the wild grass that grew in the wall, and the chicken's downy feathers, both of which things let themselves float upon the wind's breath to their full extent, with the unresisting submissiveness of light and lifeless matter."

Answer 1

Best Answer - Chosen by Voters

I'd drop the "things" it sounds unnatural at best.