The battle of Manassas.
New York, Aug. 8.
--The Herald publishes what purports to be General McDowell's Official Report of the loss of property resulting from the disastrous battle on the 21st of July, at Bull's Run: Seventeen rifled and eight smooth-bored cannon, 150 boxes small arms and cartridges, 87 boxes rifled cannon and ammunition, 30 boxes of old fire-arms, [Qr. ? What did McDowell want with them?] 13 wagon loads of provisions, 3,000 bushels of oats, 2,500 muskets, and 8,000 knapsacks.
