4:53 PM 4/30/1997 Note: Brock, a practicing lawyer, is a teaching fellow on the faculty of Texas Tech University School of Law. His article, `The Republic of Texas Is No More': An Answer to the Claim that Texas was Unconstitutionally Annexed to the United States, will be published in the Texas Tech Law Review later this spring. Still true today: 'The Republic of Texas is no more' By RALPH H.