Read it through once

I had often heard the song before, and always with lively delight; for Bessie had a sweet voice,—at least, I thought so. But now, though her voice was still sweet, I found in its melody an indescribable sadness. Sometimes, preoccupied with her work, she sang the refrain very low, very lingeringly; “A long time ago” came out like the saddest cadence of a funeral hymn. She passed into another ballad, this time a really doleful one.