It had long been customary, as she never changed her room, for those who had anything to say to her apart, to wheel her to her desk; where she sat, usually with the back of her chair turned towards the rest of the room, and the person who talked with her seated in a corner, on a stool which was always set in that place for that purpose. Except that it was long since the mother and son had spoken together without the intervention of a third person, it was an ordinary matter of course within the experience of visitors for Mrs Clennam to be asked, with a word of apology for the interruption, if she could be spoken with on a matter of business, and, on her replying in the affirmative, to be wheeled into the position described.

Therefore, when Arthur now made such an apology, and such a request, and moved her to her desk and seated himself on the stool, Mrs Finching merely began to talk louder and faster, as a delicate hint that she could overhear nothing, and Mr Casby stroked his long white locks with sleepy calmness.

'Mother, I have heard something to-day which I feel persuaded you don't know, and which I think you should know, of the antecedents of that man I saw here.'

'I know nothing of the antecedents of the man you saw here, Arthur.'

She spoke aloud. He had lowered his own voice; but she rejected that advance towards confidence as she rejected every other, and spoke in her usual key and in her usual stern voice.

'I have received it on no circuitous information; it has come to me direct.'

She asked him, exactly as before, if he were there to tell her what it was?

'I thought it right that you should know it.'

'And what is it?'

'He has been a prisoner in a French gaol.'

She answered with composure, 'I should think that very likely.'

'But in a gaol for criminals, mother. On an accusation of murder.'

She started at the word, and her looks expressed her natural horror. Yet she still spoke aloud, when she demanded:--

'Who told you so?'

'A man who was his fellow-prisoner.'

'That man's antecedents, I suppose, were not known to you, before he told you?'

'No.'

'Though the man himself was?'

'Yes.'

'My case and Flintwinch's, in respect of this other man! I dare say the resemblance is not so exact, though, as that your informant became known to you through a letter from a correspondent with whom he had deposited money? How does that part of the parallel stand?'

Arthur had no choice but to say that his informant had not become known to him through the agency of any such credentials, or indeed of any credentials at all. Mrs Clennam's attentive frown expanded by degrees into a severe look of triumph, and she retorted with emphasis, 'Take care how you judge others, then. I say to you, Arthur, for your good, take care how you judge!'

Her emphasis had been derived from her eyes quite as much as from the stress she laid upon her words. She continued to look at him; and if, when he entered the house, he had had any latent hope of prevailing in the least with her, she now looked it out of his heart.

'Mother, shall I do nothing to assist you?'

'Nothing.'