in the organization of the army, and in the various staff departments; and the cavalry, hitherto scattered among the Grand Divisions,
See page 485, volume II. and without organization as a corps, were consolidated, and soon
Picket Hut. placed in a state of greater efficiency than had ever before been known in the service.
To improve them, they were sent out upon raids within the Confederate lines whenever the state of the roads would permit, and for several weeks the region between Bull's Run and the Rapid Anna was the theater of many daring exploits by the cavalry of both armies.
Finally, at the middle of April, Hooker's ranks were well filled by the return of absentees, and at the close of that month, when he felt prepared for a campaign, his army was in fine spirits, thoroughly disciplined, and numbered one hundred and ten thousand
The Lacy House — Hooker's Headquarters.
this is a view of the Lacy House, opposite Fredericksburg, from which Sumner observed the operation