... Harrison's island, perhaps both, but probably the latter, commanded, as it was, by the bluffs on their side. On the 15th he telegraphed that there was considerable movement between the river and Leesburg -apparently preparations for resistance rather than attack. On the 18th, at 10.45 P. M., he telegraphed that the enemy's pickets were withdrawn from most of the posts in our front; that he had sent ...