While these operations were in progress, there was a short and unexpected diversion in the extreme south-west corner of Estremadura, caused by the appearance of an outlying French column in that quarter, which had no connexion with Latour-Maubourg. A word as to this is necessary, since its result was to bring a new Spanish force into Beresford’s sphere of operations. When Soult returned to Andalusia in the middle of March, his first care was to drive off Ballasteros and the other detachments which had been threatening Seville in his absence. They gave back into the Condado de Niebla, as has already been mentioned. But at the end of the month the situation was complicated by the news that an expedition from Cadiz, the division of Zayas, had landed at Moguer, in the estuary of the Rio Tinto, and seemed about to join Ballasteros. If this junction had been made, the force collected in the west would have been too large to be safely neglected. Wherefore Soult sent out General Maransin and the Prince of Aremberg, the former with seven battalions of Gazan’s division, and the latter with two cavalry regiments, to attack the Spaniards. At the approach of this column of 4,500 men Zayas re-embarked, losing 300 men from his rearguard in so doing (April 1). Ballasteros retired into the mountains. Maransin thought it his duty to endeavour to make an end of this active and elusive adversary, whose constant appearances and reappearances on the flank of Seville had caused so much trouble. Sending back his cavalry and guns, he plunged into the hills with his infantry, and for twelve days hunted Ballasteros up and down the rugged upper valleys of the Odiel and the Rio Tinto. On April 12th Ballasteros, gradually pushed northward, came down to Fregenal, on the borders of Estremadura, where he offered battle, but was beaten, and fled to Xeres de los Caballeros. Maransin pursued, and reached that place on the 11th, while Ballasteros retired to Salvatierra de los Barros, not far from Santa Marta, and close on the flank of Beresford’s army. Maransin, who had long been cut off from touch with other French detachments, was wholly unaware that he had run into the neighbourhood of a British force, and would have been captured, or defeated, if he had stayed a day longer at Xeres, for Ballasteros had called for help to Beresford, and the latter was preparing to throw two divisions upon his flank and rear[348]. Letters from Latour-Maubourg to Maransin, to warn him of his danger, were intercepted by the guerrilleros and sent to the British camp[349]. But an _Afrancesado_, one of the principal inhabitants of Xeres, warned the French general just before it was too late: and, hastily leaving his position at night, Maransin retired into Andalusia via Fregenal and Aracena, and ultimately joined Latour-Maubourg by a circuitous route.