“That the Pursuer (Mrs. Geils) having instituted a suit against the Defender (Mr. Geils) in the Arches Court of England, founded on the acts of adultery, which are libelled on in the present action, and having in that process obtained, in April 1848, a regular sentence of separation à mensâ et thoro à mensâ et thoro , is barred from maintaining the present action in this Court.”