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The Wall Street Journal
wsj.com
did:plc:i3fhjvvkbmirhyu4aeihhrnv
The familiar five-line music staff emerged from an 11th-century monk who mapped pitches onto the human hand when directing the choir. on.wsj.com/4jWBbTj
https://on.wsj.com/4jWBbTj
2026-01-23T16:19:51.432Z