I learned this round at girl scout camp 1936-37 in the Adirondack Mts. of NY. However, I never saw a written version, we learned by singing it. I always imagined the word as "choral". We sang:

White choral bells, upon a slender stalk
lillies-of-the-valley, deck my garden walk.
Oh, don't you wish, that you might hear them ring,
that will happen only when the fairies sing.

Meaning: You will hear them ring, but only if you believe in   
          fairies !