MAY 11th. ─ Robert Tyler has arrived, after wonderful risks and difficulties. When I left Mr. Tyler in the North, the people were talking about electing him their representative in Congress. They tempted him every way, by threats and by promises, to make them a speech under the folds of the “star spangled banner” erected near his house. But in vain. No doubt they would have elected him to Congress, and perhaps have made him a general, if he had fallen down and worshiped their Republican idol, and fought against his father.