"Sweeney's Buttermilk", also known as "Charlie Lennon's Reel", "Buttermilk Mary", "Charlie's Buttermilk Mary", "Brendan McGlinchey's" or “Scarce o' Tatties" is an Irish Reel in (whole or cut time) and A Dorian, B Minor or B Dorian. The parts are played AABB. This is a modern composition by fiddler Brendan McGlinchey (1940 - 2020) (though sometimes mistakenly attributed to Charlie Lennon). The story goes that McGlinchey was attending a musical event and found accommodations in the caravan of a man named Sweeney, with whom he shared his stay. Sweeney, like McGlinchey, was quite fond of buttermilk. The tune is usually played in the key of B Minor/B Dorian. It appears in Bulmer & Sharpley’s collection Music from Ireland, vol. 4 (1976) (as “Charlie Lennon’s” sourced to Lennon as at the time the tune’s title was unknown). It was printed in Taylor's Through the Half-door (1992). It was recorded by Touchstone on The New Land (1982), The Chieftains on 9 (1979), Brendan Mulvihill & Donna Long on The Morning Dew (1992), Vinnie Kilduff on The Boys from the Blue Hill (1990), Seamus & Kevin Glackin on Na Saighneáin/Northern Lights (1988), Silly Wizard on Golden, Golden (1984) and So Many Partings (1979), Shaskeen on Atlantic Breeze (1988) and Kevin Burke on Sweeney’s Dream (c. 1970’s).