Irie FM reports:
Music News understands that Barry fell ill and was taken to the Kingston Public hospital where he died in the wee hours this morning.Llewellyn's/The Heptones' biography can be found at Trojan Records and AllMusic.com.
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Update (11/27/11): The BBC has just posted an obituary for Llewellyn, which may be found here.
Update (11/29/11): The New York Times published an obituary for Llewellyn here.