He ditched just off the village of Salonelles. The confusion about his reported ditching "in the Orne" arose because what actually happened was that the French recoverers apparently dug the airplane free of the mud in its ditching location, then attached flotation bags to it to lift it free when the tide came in. When the tide did come in that night, it indeed floated free but was also carried a considerable distance away, into the Orne, I guess as the tide went back out.
So the actual "recovery" took place, the next day, at a location that wasn't the ditching spot.