Then with his clenched right hand he smote the open palm of the other.

His resolve was taken.

By fair means or foul, with Robespierre's sanction or without it, he would keep his word.

After not only the hope but the assurance he had given Suzanne that her betrothed should go free, he could do no less than accomplish the Vicomte's enlargement by whatever means should present themselves.
And now to seek a way.

He recalled the free pardon to which Robespierre had gone the length of appending his signature.