Song: Goodbye So Soon
Artist: Vincent Price
Composer: Henry Mancini
Soundtrack: Basil The Great Mouse Detective

Recently, I had a view of the cartoon and looked at a tab, but I think the song 
uses the key as demonstrated;

       C     
   Goodbye so soon
       F    Fm    C 
   And isn't this a crime?
      F      Bb7      C         A7     D7
   We know by now that time knows how to fly 
   G7           C  
   So here's goodbye so soon
          F        Fm      C
   You'll find your separate way
        F      Fm        C/E   A7
   With time so short I'll say so long
       D7
   And go
      G7
   So soon
       C
   Goodbye

                    D9
   You followed me, I followed you
           Dm                Fm           C
   We were like each other's shadows for a while
                   E7           Am 
   Now as you see, this game is through  
        D9                           Dm
   So although it hurts, I'll try to smile

   Em G7
   As I say

       C     
   Goodbye so soon
       F    Fm    C 
   And isn't this a crime?
      F      Bb7      C         A7     D7
   We know by now that time knows how to fly 
   G7           C  
   So here's goodbye so soon
          F        Fm      C
   You'll find your separate way
        F      Fm        C/E   A7
   With time so short I'll say so long
       D7
   And go
      G7
   So soon
       C
   Goodbye