Which Alice?

ALICE IN PUZZLE-LAND
them told the truth, or maybe the other one did, or maybe they
both did, but I can't remember which."
This concluded the White Knight's account. Of all the trial
accounts I have ever heard in my life, thought Alice, this is the most
unsatisfactory! Yet, as Alice pondered more and more over this
problem, she came to realize that despite all the White Knight's
memory lapses, he had given her enough information to decide
whether the first, the second, or the third defendant was guilty.
Which one was guilty? (This is Problem 78.)
THE SECOND ACCOUNT "Yes, I've seen some fine trials, some
very fine ones!" said the Knight, after Alice had solved the last
puzzle.
"Tell me another," requested Alice.
The puzzle which now follows is one of the best that Alice had
ever heard.
"Well," said the Knight, "the trial of last month was quite
interesting. Again there were three defendants, and only one of
them was guilty. The first defendant spoke first, then the second
defendant spoke, and the third defendant spoke last."
"But what did they say?" asked Alice.
"I don't quite remember what they said," replied the Knight, "but
I do remember that each of the defendants accused one of the
others. However, I can't remember who accused whom. And now,
can you figure out who was guilty?"
"Of course not!" replied Alice. "So far you have told me
practically nothing! Could you at least tell me which ones lied and
which ones told the truth?"
"Very interesting that you should have asked that," replied the
Knight, "because two weeks ago I told this case to the White King,
who had been unable to attend the trial. The White King asked me
the very same question, and when I told him which of the three lied
and which ones told the truth, he was able to deduce who the guilty
one was."
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