Although in the month of July, the night was overcast and dark when the little band who undertook this perilous service left the town of Pampeluna, and, passing through the outer fortifications, struck into the open country. It consisted of four horsemen and two to three hundred foot soldiers, the latter almost without exception young men between twenty and thirty years of age, scarcely one of whom but might have been cited as an example of the highest perfection of hardiness and activity to which the human frame can be brought by constant exposure to climate, by habit of exertion and endurance of fatigue. Long-limbed, muscular and wiry, lightly clad in costumes remarkable for their picturesque and fantastical variety; unencumbered by knapsacks, or by any baggage save a linen bag slung across the back, and containing rations for two days; their long muskets over their shoulders; belts, full of cartridges and supporting bayonets, strapped tightly round their waists, they strode over hill and dale at a pace which kept the officers' horses at an amble. Fine studies were these for a painter desirous of depicting banditti or guerillas. Their marked features and sunburnt cheeks were shaded by broad flat caps, from beneath which shining ringlets of black hair hung down to their bare bronzed necks. Contempt of danger and reckless daring were legibly written on every one of their countenances, accompanied, it is true, in some instances, by the expression of less laudable qualities. In the plain and in a regular action, they might have been no match for more highly disciplined troops; but it was evident that as light infantry, and for mountain warfare, their qualifications were unsurpassed, if not unequalled, by any troops of any country.