|From the episode:||V is for Mystery|
"September Morn" is the title track of the album of the same name by Neil Diamond.
Neil sings "September Morn" on a ship bound for America in 1896 London while Stewie, as Sherlock Holmes seeks professor Moriarty after he has stolen the crown jewels in "V is for Mystery". Sherlock is surprised that Neil Diamond isn't singing "America", another song of his.
We danced until the night
Became a brand new day...