 Leng identifies "Sour Milk Sea" as marking three important "firsts" in Harrison's career.It was the first song Harrison "gave away" to another artist, a sign that his output as a songwriter had outgrown the quota of tracks typically allocated to him on Beatles releases.The Lomax album project also marked the first time that Harrison served as producer for another artist, after he had produced sessions in London and Bombay for his own debut solo album, "Wonderwall Music".