September 15. Some rumors yesterday and more direct information to-day are cheering to the Union cause. McClellan telegraphs a victory, defeat of the enemy with loss of 15,000 men, and that “General Lee admits they are badly whipped.” To whom Lee made this admission so that it should be brought straight to McC. and telegraphed here does not appear. A tale like this from Pope would have been classed as one of his fictions. It may be all true, coming from McClellan, but I do not credit Lee’s confession or admission. That we have had a fight and beaten the Rebels, I can believe. It scarcely could have been otherwise. I am afraid it is not as decisive as it should be, and as is the current belief, but shall rejoice if McC. has actually overtaken the Rebels, which is not yet altogether clear.