Temur,
 
  "Cantico del Sole" is the last poem in the "Moeurs Contemporaines" group you'll find in
the Collected SHORTER Poems, not the Coll. EARLY Poems. In my Faber ed. [repr. of ND 1949
"Personae"] it's on p. 183:
 
                 Cantico del Sole
             (From "Instigations")
 
  The thought of what Amwerica would be like
  If the Classics had a wide circulation
                Troubles my sleep,
  The thought of what America,
  The thought of what America,
  The thought of what America would be like
   If the Classics had a wide circulation
                Troubles my sleep.
  Nunc dimittis, now lettest thou thy servant,
  Now lettest thou thy servant
                 Depart in peace.
  The thought of what America,
  The thought of what America,
  The thought of what America would be like
   If the Classics had a wide circulation . . .
                 Oh well !
                 It troubles my sleep.
 
[attached is a longer note by Gallup saying that the poem concluded the essay "The Classics
>Escape<" in "Instigations" of 1920. My reprint of "Instigations" (Books For Libraries Press,
Freeport, NY 1969) however doesn't contain that essay; and I haven't looked into Gallup yet to
find out if maybe it's available in other prose collections [I'd rather say no]... Anyway, it's in the
CEP.
 
alex