Reille next sent his brother, at the head of 5000 foot and 200 horse, against this harassing enemy. For the last month Mina had been manufacturing arms, ammunition, and clothing for his men, at Lumbier, and there two thousand of the French found him. Aware of their intention, and having concerted measures with his officers, he did not disturb the soldiers in the rest which they were enjoying, till the moment arrived. Then, telling them what the force was which was ordered against them, they exclaimed, with one voice, that it would not be for their honour to abandon the post without resistance, even though all France should attack it. Two companies, under D. Juan de Villanueva, defended the fords of the river, and repulsed the enemy in their first attempt at crossing, forcing them to retire with such precipitation, that some of Mina’s men, who passed over at night to see what they had left behind, collected more than a hundred muskets from the field. The French took a position which Mina was not strong enough to force, and for a day and a half both parties kept up a fire upon each other; by that time a reinforcement came to the enemy from Pamplona. The river was well defended against them, and before they won the passage they lost above 300 killed, and twice the number wounded: among those who died of their wounds was Leon Asurmendi, a renegade Spaniard, known by the name of _Conveniencias_, and infamous for the crimes which he had committed in aid of the intrusive government. Having succeeded in crossing the river, the French chose rather to perpetrate their usual cruelties upon the inhabitants of Lumbier than follow Mina, who retired without loss, and in the best order. They obtained information from some traitors of the place where the Spaniards had their hospital; but Cruchaga and Gorriz were too vigilant to let it be surprised, and when the enemy approached they were so warmly received that they were driven back the four hours’ march to Lumbier, leaving on the way sixty killed, many wounded, and twelve prisoners.
Mina was at this time raising a fourth battalion; the French sent a detachment to cut it off before it should be completely formed. Four hundred and fifty men, destined for this service, proceeded against the village of Echarri-Aranaz, where the commandant of the battalion, D. Ramon de Ulzurrun y Eraso, had only about one hundred to oppose them. He left the village, and disposed his handful of men so judiciously, for the double purpose of concealing their numbers and annoying the enemy, that the French dared not enter the place, and during the night the officers did the piquet duty themselves, being afraid to trust their soldiers. “Reams of paper,” Mina said, “would not suffice for the details of all the skirmishes in which he and his party were engaged, ... for every day, and sometimes twice or thrice in the day, they were occurring.”