Journal of Surgeon Alfred L. Castleman.

6th.–Accompanied the Brigade to-day on a reconnoisance. Frequent skirmishes with small bodies of the enemy. One man in Company F received a slight flesh wound in the thigh –the first blood spilt by our Regiment in the cause. We encamped to-day near “Lee’s Mill,” on the narrow neck of land spoken of yesterday, and about four miles from Yorktown. The whole distance between the James and York Rivers here is only about seven miles. Warwick Creek, emptying into the James, rises about two miles from Yorktown, and a small creek emptying into the York River takes its rise amongst the sources of Warwick Creek, so that the two rivers are here nearly connected by these two creeks. These creeks have wide, marshy bottoms, now deeply overflowed by means of dams thrown across at short distances apart by the enemy. And the whole western border of these marshes, now lakes, are strongly protected by earthworks, mounting heavy guns. This lake, or marsh, we must now cross before we can advance on Richmond. The enemy’s force here we do not know, but suppose it to be inconsiderable. This is a very strong point, and if well manned it is almost impregnable. My opinion is, that they have but a small force here. This, however, is a matter of conjecture. All are expecting a big battle at this point.