Fawn Brodie describes the Book of Mormon translation...

Similarly, too, when "translating" the Book of Mormon he sometimes used what he called the sacred Urim and Thummin, sometimes the mundane seer stone. Often he had a curtain separating himself from his secretary, but with Cowdery he seems to have abandoned it, for the latter confesses to some mystification at watching Joseph Smith translate freely when the plates were not in sight at all.*

Pg. 412-413

Keep sacred things in your heart... Luke 2:18-19

Ponder heart.

3 John 13-14