Later From Hooker's Army.

Rebels Reinforced and Attacked Hooker Again on Monday.


Longstreet Attacks Sedgwick and is Repulsed.

Rebels Attack Gibbons and would Probably Drive him from Fredericksburg.


NEW YORK, May 6. — The steamer Australian, from Liverpool on the 25th, is below. The steamer Northern Light is also below.

The Tribune's correspondent with Hooker, writing at sunrise on Monday, says: Guns are already thundering on our left, and it is believed that to-day will prove the most disastrous to the rebels. Over 6,000 rebel prisoners have been brought in. They report that Jackson is in command of the rebel army, and that reinforcements have been sent them from North Carolina and the Peninsula. Our loss is heavy. Gen. Hill killed.

Another correspondent with Sedgwick's division, dating Monday morning, says the battle opened at daylight and is still going on, on the hill at the extreme left.

Gibbon's division of the second corps returned to Falmouth last night, and Hall's brigade has gone over. All non-combatants are leaving, except surgeons.

The cracking of musketry nears us, and rifle pits are even being erected on our side of the river, to protect the bridges.

The Times' correspondent with Hooker, writing on Sunday night, says that General is re-organizing the 11th army corps, which has been placed on duty again.

Gen. Averill, with his cavalry command, reported to Gen. Hooker on Sunday afternoon, having been as far South as Rapidan Station, where they destroyed the bridge on the Orange & Alexandria railroad, and drove Lee and Stuart out of Culpepper.

Averill has received instructions to perform further important work.

The headquarters of Gen. Hooker to-night are under a tree.

The Times' correspondent with Sedgwick gives further details of the Fredericksburg fight, but nothing new except Monday forenoon's work, stating that a considerable body of rebels had made their appearance below Fredericksburg, and were marching on that place to gain a position in the rear of Sedgwick's corps. This force was judged to be Longstreet's, but his attempt to re-take the hill was unsuccessful.