As it happens, this song lyric,
with a link to a MIDI file (haven't tried playing it back),
is already in Mudcat's DigiTrad:

The Youth of the Heart

What is missing is the identification of those who
wrote and composed the song.

Sydney Carter wrote the lyrics for a revue
(the Globe Revue),
and the lyrics were set to music
by Donald Swann,
he of
Flanders and Swann / At the Drop of a Hat.

Since I can't enter that information into the
Digital Tradition file,
the least I can do is
begin a Mudcat thread
which sets the record straight.