Sure there is. Everything we know about Davis' position on the issue indicates he supported it. There is accordingly no reason to believe that he would have changed his position in those documents. Face it, non-seq. You are grasping at straws in your bizarre obsession over the confederate courts.
We have only your say-so and one sentence in a speech to support that. A matter so important to him that he left the matter to the end, after matters affecting the post office.