ain free use of the thumb that is never seen but in a hand
accustomed to tools.

'You keep with us,' said Mr Meagles, in a threatening kind of Way, 'and
I'll introduce you presently. Now then!'

Clennam wondered within himself, as they took the nearest way to the
Park, what this unknown (who complied in the gentlest manner) could have
been doing. His appearance did not at all justify the suspicion that he
had been detected in designs on Mr Meagles's pocket-handkerchief; nor
had he any appearance of being quarrelsome or violent. He was a quiet,
plain, steady man; made no attempt to escape; and seemed a little
depressed, but neither ashamed nor repentant. If he were a criminal
offender, he must surely be an incorrigible hypocrite; and if he were no
offender, why should Mr Meagles have collared him in the Circumlocution
Office? He perceived that the man was not a difficulty in his own
mind alone, but in Mr Meagles's too; for such conversation as they had
together on the short way to the Park was by no means well sustained,
and Mr Meagles's eye always wandered back to the man, even when he spoke
of something very different.

At length they being among the trees, Mr Meagles stopped short, and
said:

'Mr Clennam, will you do me the favour to look at this man? His name
is Doyce, Daniel Doyce. You wouldn't suppose this man to be a notorious
rascal; would you?'

'I certainly should not.' It was really a disconcerting question, with
the man there.

'No. You would not. I know you would not. You wouldn't suppose him to be
a public offender; would you?'

'No.'

'No. But he is. He is a public offender. What has he been guilty of?
Murder, manslaughter, arson, forgery, swindling, house-breaking, highway
robbery, larceny, conspiracy, fraud? Which should you say, now?'

'I should say,' returned Arthur Clennam, observing a faint smile in
Daniel Doyce's face, 'not one of them.'

'You are right,' said Mr Meagles. 'But he has been ingenious, and he has
been trying to turn his ingenuity to his country's service. That makes
him a public offender directly, sir.'

Arthur looked at the man himself, who only shook his head.

'This Doyce,' said Mr Meagles, 'is a smith and engineer. He is not in a
large way, but he is well known as a very ingenious man. A dozen years
ago, he perfects an invention (involving a very curious secret process)
of great importance to his country and his fellow-creatures. I won't say
how much money it cost h