motive which I should be
obliged to admit, his end would be gained. Those inquiries which I had
pledged myself to pursue--those inquiries which might, at any moment,
take a turn that directly concerned him--would, in that case, be
successfully diverted from the right to the wrong person. The innocent
maid would set my strictest scrutiny at defiance; and Dexter would be
safely shielded behind her.

I determined to give him time. Not a word passed my lips.

The minutes followed each other. I waited in the deepest anxiety. It was
a trying and a critical moment. If he succeeded in inventing a probable
motive, and in shaping it neatly to suit the purpose of his story, he
would prove, by that act alone, that there were reserves of mental
power still left in him which the practiced eye of the Scotch doctor had
failed to see. But the question was--would he do it?

He did it! Not in a new way; not in a convincing way; not without a
painfully evident effort. Still, well done or ill done, he found a
motive for the maid.

"Cunegonda," he resumed, "takes from its place of concealment in
her bosom a written paper, and unfolds it. 'Look at this,' she says.
Damoride looks at the paper, and sinks again at her mistress's feet in a
paroxysm of horror and despair. Cunegonda is in possession of a shameful
secret in the maid's past life. Cunegonda can say to her, 'Choose
your alternative. Either submit to an exposure which disgraces you
and--disgraces your parents forever--or make up your mind to obey Me.'
Damoride might submit to the disgrace if it only affected herself. But
her parents are honest people; she cannot disgrace her parents. She is
driven to her last refuge--there is no hope of melting the hard heart of
Cunegonda. Her only resource is to raise difficulties; she tries to show
that there are obstacles between her and the crime. 'Madam! madam!' she
cries; 'how can I do it, when the nurse is there to see me?' Cunegonda
answers, 'Sometimes the nurse sleeps; sometimes the nurse is away.'
Damoride still persists. 'Madam! madam! the door is kept locked, and the
nurse has got the key.'"

The key! I instantly thought of the missing key at Gleninch. Had he
thought of it too? He certainly checked himself as the word escaped him.
I resolved to make the signal. I rested my elbow on the arm of my chair,
and played with my earring. Benjamin took out his pencil and arranged
his note-book so that Ariel could not see what he was about if sh