HarpsichordConcerto

Kindly let me know who do you think wrote this? Readers who recognise it immediately might like to refrain, to encourage those more speculative amongst us to have a guess.

I quote from the source as follows. Enjoy!

Madame Mutter!
I like to eat Butter
We are, Thank the Lord,
Healthy and never bored.
Our trip is bright and sunny,
Though we haven't any money;
We enjoy the company we keep,
We are not sick, we do not weep. ...