Chuck & Mary Perrin were a brother and sister folk duo who played together from 1965 until the late 70s. They recorded two self-financed LPs in 1968 and 1969 entitled 'Brother & Sister' and 'Next Of Kin', then a third LP 'Life Is A Stream' for Sunlight Records in 1971 which featured fuller arrangements and orchestration from members Chicago Symphony Orchestra. All of these albums have recently been reissued by Rev-ola Records in the UK and MP3s are available at Chuck's site. Read more on Last.fm