The song is called "Alone" sung by none other than Marvin Gaye and Diana
Ross, an unreleased gem from the 1973 sessions that resulted in the
uneven "Diana & Marvin". It's on the reissue but but far superior to anything
else on the record other than another unreleased recording "The Things I
Will Not Miss" (Bacharach/David).

I placed a copy in the Audities Yhoo groups Musica folder for the next
week if you wish to sample. The file is called "alone".

 - michael