Weeks of the bitterest winter weather suspended all military operations after St. Pierre. The rivers were flooded; the clayey lowlands were one far-stretching quagmire; fogs brooded in the ravines; perpetual tempests shrieked over the frozen summits of the Pyrenees; the iron-bound coast was furious with breakers. But Wellington's hardy veterans--ill-clad, ill-sheltered, and ill-fed--yet kept their watch on the slopes of the Pyrenees. The outposts of the two armies, indeed, fell into almost friendly relations with each other. Barter sprang up between them, a regular code of signals was established, friendly offices were exchanged. Wellington on one occasion desired to reconnoitre Soult's camp from the top of a hill occupied by a French picket, and ordered some English rifles to drive them off. No firing was necessary. An English soldier held up the butt of his rifle and tapped it in a peculiar way. The signal meant, "We must have the hill for a short time," and the French at once retired. A steady traffic in brandy and tobacco sprang up between the pickets of the two armies. A rivulet at one point flowed between the outposts, and an Irish soldier named Patten, on sentry there, placed a canteen with a silver coin in it on a stone by the bank of the rivulet, to be filled with brandy by the French in the usual way. Canteen and coin vanished, but no brandy arrived. Patten, a daring fellow, regarded himself as cheated, and the next day seeing, as he supposed, the same French sentry on duty, he crossed the rivulet, seized the Frenchman's musket, shook the amazed sentry out of his accoutrements as a pea is shaken out of its pod, and carried them off. The French outposts sent in a flag of truce, complained of this treatment, and said the unfortunate sentry's life would be forfeited unless his uniform and gun were restored. Patten, however, insisted that he held these "in pawn for a canteen of brandy," and he got his canteen before the uniform was restored. On February 12 a white hard frost suddenly fell on the whole field of operations, and turned the viscid mud everywhere to the hardness of stone. The men could march, the artillery move; and Wellington, whose strategy was ripe, was at once in action.