The sun had but just risen when this division, after driving in the Carlist cavalry pickets, which had been pushed up to within half a league of Artajona, halted and took position to the right of the high-road between that town and Mendigorria. The ground thus occupied is level, and opposite to nearly the centre of a line of low hills, which, after running for some distance parallel to the Arga, recedes at either extremity, thus forming the flattened arc of a circle, of which the river is the chord. Between the hills, which are inconsiderable and of gradual slope, and the river, runs the high-road from Puente de la Reyna to Larraga; and in rear of their more southerly portion, known as La Corona, opposite to the place where the road from Artajona passes through a dip or break in their continuity, are the town and bridge of Mendigorria. Upon these hills the Carlists, who had passed the night in the last-named town, now formed themselves, their main body upon the eastern slope, their reserves upon the western or reverse side. They were still bringing their masses into position, when the Christino right came upon the ground, and for awhile, although the distance between the hostile forces was not great, no shot was fired on either side. By and by, however, the dark figures of the Carlist guerillas were seen racing down the hills, the Christino skirmishers advanced to meet them, and soon a sharp irregular fire of musketry, and the cloud of smoke which spread over the middle ground between the armies, announced that the fight, or at least the prelude to it, had begun. This desultory sort of contest was of short duration. Several Carlist battalions moved forward, a gallant attack was made on the Christino position, and as gallantly repelled: commanded by a brave and skilful officer, and favoured by a judicious choice of ground, the Queen's troops, although opposed to vastly superior numbers, and without their cavalry, which had remained with the reserve, repulsed repeated assaults, and held their own without serious loss, until, towards ten o'clock, the heads of columns of the centre of the army, under the commander-in-chief himself, made their appearance from the direction of Artajona. Almost at the same time, the left wing, with Espartero at its head, arrived from Larraga, where it had slept. Some little manoeuvring took place, and then the whole Christino army appeared formed up, Cordova on either side of the high-road, Espartero on his left, nearer to the Arga, Gurrea on his right. By a rather singular arrangement, the whole force of cavalry, under General Lopez, was left in reserve, considerably in rear of the left wing, and at a full mile and a half from the centre; with the exception of one squadron, which, as well as his habitual escort, had accompanied General Cordova. That squadron was commanded by Luis Herrera.