Groping our way in the dark, we advanced, and, having crossed the Barbate, were informed that the enemy were again retiring. Hurrying on to the convent, where we arrived at daybreak, we instantly opened a roaring fire of musketry against the building, more to make a noise than with the expectation of producing any other effect. Leaving the Tarifa Volunteers with a few red soldiers interspersed, Colonel Browne with the regiment moved towards Medina. We had not proceeded far before we encountered a party of about sixty men, infantry and cavalry, who, upon hearing our fire at the convent, had turned round. They were instantly put to flight. Pressing forward towards a mill about a league and a half from Medina, our cavalry and guerillas, now exceeding sixty in number, were detached to the mill, as we knew it to be a post occupied by the enemy. On their approach the enemy fled, when the mill, together with strong fieldworks and extensive stabling recently finished, was set fire to, thus informing the enemy at Medina of our advance. Upon this, a formidable detachment were sent against us. Coming close, they halted for a short time, but soon displayed their boldness by a menacing advance, while we showed our judgment by steadily retiring, covered by our cavalry and the light company. As we fell back on Casa Vieja, firing was heard in the direction of Medina Sidonia. The enemy halted; we conformed. On both sides the cavalry skirmished by long shots. This petty warfare continued nearly two hours, when we retired gradually to our position over the convent. Here Colonel Browne received a despatch from General Beguines informing him that he had taken Medina, but that the enemy were in strong force before him, and that he anxiously awaited the result of the sortie from the Isla de Leon. [Sidenote: A GALLANT FRENCHMAN.]