The two verses that Richard Dyer-Bennet composed, with the happy ending referred to above, are as follows:

Then Frog and Mouse lived happily, mm-hmm,
Then Frog and Mouse lived happily, mm-hmm,
Then Frog and Mouse lived happily,
And they were blessed with children three,
Mm-hmm, mm-hmm. mm-hmm.

And one did croak and two did squeak, mm-hmm,
And one did croak and two did squeak, mm-hmm,
One did croak and two did squeak,
And they had long tails and webbed feet,
Mm-hmm, mm-hmm. mm-hmm.

Cheerily,
Charlie Ipcar