Read this letter written by US General Ulysses S. Grant. Which sentences most clearly indicate that the writing style is informal and that this is a personal letter? All I can say is that I am well. I have the enemy closely hemmed in all round. My position is naturally strong and fortified against an attack from outside. I have been so strongly reinforced that Johnston will have to come with a mighty host to drive me away.—I do not look upon the fall of Vicksburg as in the least doubtful. If, however, I could have carried the place on the 22nd of last month, I could by this time have made a campaign that would have made the State of Mississippi almost safe for a solitary horseman to ride over. As it is, the enemy have a large army in it, and the season has so far advanced that water will be difficult to find for an army marching, besides the dust and heat that must be encountered. The fall of Vicksburg now will only result in the opening of the Mississippi River and demoralization of the enemy. I intended more from it. I did my best, however, and looking back can see no blunder committed.