Read it through once

By the slave women that are among the gifts sent to Cleon, seems to be indicated the degradation of the spiritual by its subjection to earthly ideals, as were the ideals of Greek art. This is more particularly indicated by the one white she-slave, the lyric woman, whom further on in his letter, Cleon promises to the King he will make narrate (in lyric song we must suppose) his fortunes, speak his great words, and describe his royal face.