"St. James Infirmary Blues" is an American blues song of uncertain origin. Louis Armstrong made the song famous in his 1928 recording on which Don Redman was credited as composer; later releases gave the name Joe Primrose, a pseudonym of Irving Mills. The melody is 8 bars long, unlike songs in the classic blues genre, where there are 12 bars. It is in a minor key, and has a 4/4 time signature, but has also been played in 3/4.