Jack, I learned this round at Stirling University Heritage of Scotland* summer schools with tutor Jean Redpath back in the early 1980s -- it does exist!

No-one really knew what the last line was so we sang 'deja mori' and convinced ourselves it was something to do with being already dead - -

*We did quite a few rounds from different cultures as warm ups and exercises, tho our main study was Scottish songs and ballads