'If you can prove that to me—' said Jack.
'I can and will,' I interrupted; then, turning to Sanderson, I demanded:—
'When are you to meet this man next?'
'Tonight, at nine o'clock,' he answered. 'His monthly payment is due, and he is clamouring for the large sum I told you of.'
'Where do you meet him? In London?'
'Yes.'
'At your master's town house?'
'Yes.'
'Will you take us there, and place us where we can see him and he can't see us?'
'Yes. I trust to your honour, Mr. Valmont. A closed carriage will call for me at eight, and you can accompany me. Still, after all, Mr Valmont, we have no assurance that he is the same person this young man refers to.'