In 1846, Frenchman Urbain Leverrier independently made the same mathematical prediction as Adams. He sent his calculations to Johann Galle at the Berlin Obsevatory. Galle received the letter from Leverrier on the afternoon of Sept 23, 1846. Within 30 minutes of looking, he found Neptune that very night, exactly where he'd been advised to look. Again, we have an incredible triumph of the law of Gravity.
Newton is king.
Neptune is in the wrong place by quite a large margin. It clearly is not a fundamental law of physics. It is not a good theory with predictive power. Although the discovery of Neptune rang the death knell for one proposed law of physics, it cemented the status of Newton's law of gravity as paramount. In addition, the method by which Neptune was discovered clearly suggested that the same method could be used to predict the existence and location of the next planet.