'Satiable Curtiosity

I keep six serving-men
(They taught me all I knew);
Their names are What and Why and When
and How and Where and Who.
I send them over land and sea,
I send them east and west;
But after they have worked for me,
I give them all a rest.

I let them rest from nine till five,
For I am busy then,
As well as for breakfast, lunch, and tea,
For they are hungry men:
But different folks have different views;
I know a person small-
She keeps ten million serving-men,
Who get no rest at all!
She sends 'em abroad on her own affairs,
From the second she opens her eyes-
One million Hows, two million Wheres,
And Seven Million Whys!

I have been reading nightly to K from a collection of classic stories by the author of this poem. Without googling, can anyone tell me who penned this?