The army of Gen Hooker is again on the north side of the Rappahannock. It began to recross the river Tuesday afternoon, and was all over on Wednesday morning. The troops were annoyed considerably by the firing of the rebels from the neighboring hights, and there were some casualties, but the accounts go to indicate ihat the passage of the river was made in good order and with admirable success under the circumstances. The first reports of the retreat stated that it was preceded by a severe battle and defeat of our forces on Tuesday, but later accounts deny that there was any battle on that day, and state that the army was deliberately withdrawn from prudential reasons. Some have already made haste to charge Gen Hooker with cowardice in ordering this retreat, but it is too soon, and the facts are too imperfectly known, to make a just judgment in the matter possible, and it is quite likely to appear that Gen Hooker has demonstrated by the movement that he is a prudent leader, as he has already shown himself a bold one.