Hi Anna,
It would be great to have a recording of this poem in our collection. Unfortunately, we can't use this particular source, because there isn't enough information about the edition it was taken from to perform a US copyright check. Luckily, I found an edition of this poem that we can use (Sonia, let me know if it's not accessible for you). In the future, it's better to check with us to verify that the source you'd like to use can be used at LibriVox before recording the text.
Thanks!
Michael