Meanings of remembered this song in English

When I was planning a return trip, I remembered this song.

Great would he be who remembered this song and dance when this woman was dead.

He looks back at Ruby to see if she's remembered this song, too, but she doesn't seem to be paying attention.

She began to sing with Alys; she remembered this song from her childhood, and thought perhaps her grandfather, the great troubadour, had first sung it.