And apparently, there was.
The original poem had a verse that did not make it into the song. In it, Puff found another child and played with him after returning. Neither Yarrow nor Lipton remember the verse in any detail, and the paper that was left in Yarrow's typewriter in 1958 has since been lost.http://www.songfacts.com/detail.php?id=1276
Before I found this out, here's the verse I composed myself, a long time ago, as a child.
My song is nearly finished.Consider it released under the Creative Commons license for anyone else who wants to sing a more complete version.
All good things have their ends.
But there are new beginnings,
And dragons find new friends.
Puff's new friend's Suzy Alice,
They laugh and have great fun.
For Suzy's great-grandfather
Was Jackie Paper's son.
A slightly variant form of this appeared in the comments at http://aebrain.blogspot.com.au/2009/12/some-girls-have-thing-for-horses.html
As far as I'm aware, the lyrics of the original verses, though not this one are (C) Leonard Lipton and Peter Yarrow and no challenge to the current copyright owners is intended.