Saturday, 8th—We started back early this morning for Marietta and arrived in camp about noon. I was sent out on picket duty this afternoon. The entire Fifteenth Corps left on an expedition this afternoon, but their destination is not known. The rebels left Lost mountain, retreating to Dallas, Georgia. Our men captured some of their wagon trains. All is quiet again. No news from the North. Camp Eleventh Iowa, Marietta, Georgia.