"How Little We Know" times two! [by David Lehman]

Here is one song of that title, words and music by Carolyn Leigh (nee Rosenthal), the lyricist on such Sinatra standards as "Young at Heart," "Witchcraft," and "The Best is Yet to Come" (the latter two with music by Cy Coleman).

And here's a second song entitled "How Little We Know," this one -- by Hoagy Carmichael (music) and Johnny Mercer (words) -- a great favorite of Jacqueline Bouvier, who translated the bridge for the benefit of her French family when she spent her junior year abroad in France. Lauren Bacall introduced the song, with an admiring Bogart looking on, in To Have and Have Not.