Nursery Rhyme. XXV. Historical

[A song on King William the Third.]
As I walk'd by myself,
And talked to myself,
Myself said unto me,
Look to thyself,
Take care of thyself,
For nobody cares for thee.
I answer'd myself,
And said to myself
In the self-same repartee,
Look to thyself,
Or not look to thyself,
The self-same thing will be.