"Lullaby of Birdland"
From Tardis Wiki, the free Doctor Who reference
"Lullaby of Birdland" was a song that Bernice Summerfield sang to herself on the Winton during an expedition to Perfecton from St Oscar's University in 2593. Michael Doran listened from outside; the music put him to sleep. (PROSE: Oh No It Isn't! [+]Loading...["Oh No It Isn't! (novel)"], AUDIO: Oh No It Isn't! [+]Loading...["Oh No It Isn't! (audio story)"])
