I have not yet completed my Circuit & shall defer to a future time a statement of the decisions which have been already made— My present object in writing is to ascertain what has been the practice, if any, in the District or circuit Courts of Pennsylvania & New Jersey upon Summary applications to repeal patents under the 10th Sect. of the Patent act 1793. A case is now before me from the District Court upon a writ of error from its decisions under that Section— Several questions have arisen. 1.