Having been somewhat refreshed by our short repose at Nogales, we commenced our march on the morning of the 5th about daybreak; but scarcely was darkness succeeded by light when the fight again commenced, and continued until darkness again returned. For as soon as the enemy discovered on the morning of the 4th that the reserve had retired during the previous night from the position which they occupied at Calcabellos, they had pushed forward, and by a forced march arrived at Nogales before daybreak on the 5th. Our skirmish with their cavalry, who all carried long carbines, was rather sharp during the morning; but at a few miles’ distance from Nogales, as we approached a beautiful bridge, the skirmish became much more lively. This bridge, the name of which I do not recollect, presented a most romantic appearance. It was situated close to the foot of a hill. The stream immediately after passing through the bridge suddenly winding round the base of the high ground on the opposite bank, was entirely screened from our view as we approached the bridge, thus giving its numerous arches the appearance of so many entrances to subterranean caverns beneath the mountains, into which the current rushed. On the opposite bank and not far from the bridge, the road assumed a zigzag course; and to have allowed the enemy, who were fast increasing in numbers, to come too near would have subjected our men to a destructive fire while ascending this meandering road. To avoid this General Paget marched us quickly across, and having surmounted the zigzag road, halted us just beyond range of musket-shot from the opposite bank; he then ordered the guns to be unlimbered and the horses removed to the rear; and the division then moved on, leaving the guns apparently abandoned. At this bridge we found a party of engineers endeavouring to destroy it, but as the stream was fordable on either side, the party were sent to the rear to practise their art elsewhere. [Sidenote: SOME WORDS OF GENERAL PAGET.]