News of the Battles of the 6th and 12th of July reach England.--Rejoicings on the occasion, particularly described in a letter from Mrs. Saumarez.--Promotion of Lieutenant Dumaresq.--Letters from Earl St. Vincent, Mr. Tucker, and others.--Remarks on the conduct of the Governor and Garrison at Gibraltar.--State of the crew of the Caesar.--Ship refitted.--Appoin...