‘He was until this morning,’ replied Desgrais; ‘but has returned somewhat unexpectedly, with some provincial neighbours.’

Gaudin started as he thought of Marie.

‘We must be candid with one another, Monsieur de Sainte-Croix,’ continued the exempt. ‘I need scarcely tell you that, in my position with the police, there are few in Paris whose circumstances and connections are not well known to me—amongst them I may count your own debts and your affair with the Marchioness of Brinvilliers.’

‘Well, monsieur?’

‘Well, Monsieur de Sainte-Croix. Her brother has tried in every way to crush you, and has in every way failed, until he has now bought over the greater part of the debts owing by you in Paris. The task was not difficult; for your creditors—excuse me—had better faith in his ready gold than in your promises. In his name, and collectively for those accounts, I now arrest you.’

‘Monsieur!’ cried Gaudin, ‘it is impossible for me to go with you to-night. The arrest I care nothing for, for it can soon be settled; but there is a lady here whom I cannot leave. You must postpone this affair until to-morrow, when you will find me at home.’

‘It is as much as my position is worth,’ replied Desgrais. ‘Everything will give place to a lady but a court of justice. You must come with me.’

He spoke with such a tone of calm firmness, that Gaudin perceived at once he must comply.

‘You will let me speak to her?’ he asked.

‘I would not have you go back to the room; a scene would but be painful to all of us. Write what you like and send it to her. We will then go down to some of the money-lenders on the Quai des Orfevres. If you can raise a sop for this Cerberus of a lieutenant-civil, believe me I shall be too happy. It is far from my wish to put to inconvenience so gallant a gentleman as Captain de Sainte-Croix.’