"When all the world is young, lad", in the Franklin Square Song Collection (1887), p. 20; music by Mrs Chas. Barnard. Also reprinted in A Treasury of Favorite Song, Volume 2.

  X:1
  T:When All the World Is Young Lad
  C:Words by Charles Kingsley, music by Mrs Chas. Barnard
  %%writehistory 1
  S:The Franklin Square Song Collection, 1887
  N:Kingsley titled his poem "The 'Old, Old Song'".
  M:2/4
  Q:"Allegretto"
  L:1/8
  K:A
   E | c>B B>A | A2 G z/d/ | d>F G>F | E3 c |
  w: 1.~When all the world is young, lad, And all the trees are green, And
  w: 2.~When all the world is old, lad, And all the trees are brown, And
  %
   c>B B>A | A2 G d | d>c c>B | A3 A |
  w: ev-'ry goose a swan, lad, And ev-'ry lass a queen; Then
  w: all the sport is stale, lad, And all the wheels run down; Creep
  %
   AG Af | (f>e) c>A | cB BA | (AGF) E |
  w: hey for boot and sad-dle, lad! And round the world a-way;__ Young
  w: home, and take your place* there, The spent and maimed a-mong;__ God
  %
   c>B B>A | A2 G d | d>F G>F | E3 E |
  w: blood must have its course, lad, And ev-'ry dog his day. Young
  w: grant you find one face there You loved when all was young. God
  %
   cd e^e | (gf) A> B | cE [1 {A}c>B | A3 :|2 "^rit." B>A | A3 ||
  w: Young blood must have its course, lad, And ev-'ry dog his day.***
  w: God grant you find one face there You loved when*** all was young.
  %%vskip .25in

Note: The abc2ps program used by the folkinfo.org converter apparently takes any last word in the title preceded by a comma and moves it to the front (anticipating titles like "Watch Fob, The"), so I had to remove the comma between "Young" and "Lad" to prevent the title from becoming "Lad When All the World Is Young". This is an "unadvertised feature", apparently; certainly the behavior is non-standard—and often unwanted, with no work-around that I could discover.