So she only said:

"If you will promise not to worry a bit about me, I'll go to the Land
of Oz this very afternoon. And I'll make a promise, too; that you shall
both see me again before the day comes when you must leave this farm."

"The day isn't far away, now," her uncle sadly replied. "I did not
tell you of our trouble until I was obliged to, dear Dorothy, so the
evil time is near at hand. But if you are quite sure your fairy
friends will give you a home, it will be best for you to go to them,
as your aunt says."

That was why Dorothy went to her little room in the attic that
afternoon, taking with her a small dog named Toto. The dog had curly
black hair and big brown eyes and loved Dorothy very dearly.

The child had kissed her uncle and aunt affectionately before she went
upstairs, and now she looked around her little room rather wistfully,
gazing at the simple trinkets and worn calico and gingham dresses, as
if they were old friends. She was tempted at first to make a bundle
of them, yet she knew very well that they would be of no use to her in
her future life.

She sat down upon a broken-backed chair--the only one the room
contained--and holding Toto in her arms waited patiently until the
clock struck four.

Then she made the secret signal that had been agreed upon between
her and Ozma.