[The mention of the Saints is an immediate indicator to Jean that Jesper's not from Therin. No, he's going to send a prayer to the Twelve Thirteen Gods, and in particular the Crooked Warden, Father of Necessary Pretense. While Jean's not a full priest of the Thirteenth, he has been a devotee since he was a teenager.

Jean waits by the bars of the cell, leaning against them as if in pain. It allows him a little better view of the patrols. It's not long until he gives Jesper a subtle gesture.]

Now or never, I think.