2nd.—The following extract from a letter which I have just written to a friend, is the sum and substance of my thoughts, journalized for to-day. “Major _____ will not write his mother whether an attack on Washington is expected. I will tell you what I think: From the dome of the Capitol we can see the rebels throwing up works just beyond Arlington. Every day or two we have picket skirmishing. On Wednesday night we had, within a short distance of Washington, seven men set as picket guards. The next day I saw one of the seven wounded in the side by a musket ball. The other six were killed. Almost everybody here is looking for an attack, but I do not believe we shall have one. I have no doubt that Beauregard would like to draw us out to attack him; that he would then retreat, with the hope of drawing us into his nets as he did at Bull Run. But he will not attack us here.