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Thirteen Down is the 13th album by Scottishfolk musician Bert Jansch, released in 1980. The album, credited as "The Bert Jansch Conundrum", originally appeared with at least three different sleeves, in the UK, US and Australia. There were also, on some or all of these packagings, dubious writing credits for "If I Had A Lover" and "Sweet Mother Earth", adaptations of a Swedish and Brazilian song respectively.