Rhyme? And Reason?

Each seated on his favourite post,
We chumped and chawed the buttered toast

They gave us for our tea."

"That story is in print!" I cried.

"Don't say it's not, because
It's known as well as Bradshaw's Guide!"
(The Ghost uneasily replied

He hardly thought it was).

"It's not in Nursery Rhymes? And yet

I almost think it is--
'Three little Ghosteses' were set
'On posteses,' you know, and ate

Their 'buttered toasteses.'

"I have the book; so, if you doubt it--"

I turned to search the shelf.
"Don't stir!" he cried. "We'll do without it;
I now remember all about it;

I wrote the thing myself.

"It came out in a 'Monthly,' or

At least my agent said it did:
Some literary swell, who saw
It, thought it seemed adapted for

The Magazine he edited.

"My father was a Brownie, Sir;

My mother was a Fairy.
The notion had occurred to her,
The children would be happier