Wellington's calculations were nicely adapted to the season of the year, as well as to the other conditions. He felt sure that in the rains of February and March, with all the rivers in flood, Marmont could not practically move at all, and that therefore he might be watched by a very small force, while he himself went south to continue the scheme he had formed. Elvas served, as Almeida had done, for a convenient place to make siege preparations within a short distance of Badajos, and on March 16 the famous siege was begun, ten days at least later than Wellington had intended, through the default of the Portuguese in providing transport. This was a much more serious task than the capture of Ciudad Rodrigo, the garrison being three times as large, the defences stronger, and the governor, Phillipon, a man of great energy and fertility of resource. Two of Soult's divisions were near at hand; but Wellington, having decided that he might practically ignore Marmont, had plenty of men to spare for covering the siege, at least until Soult should approach with his whole army. He had also arranged, so far as it was possible to arrange anything with the Spanish armies, that one of them should be in a position to march on Seville if Soult denuded Andalusia too completely of troops. Badajos is situated on the south bank of the Guadiana, with a strong fort on the north bank. The castle was at the north-east corner of the town, close to the river: along the east face a rivulet flowing into the Guadiana had been artificially extended into a complete defence for nearly half the length. A small outwork covered the northern end of this piece of water, and outside its southern end, on an isolated hill, stood a work called the Picurina. The plan was to breach, at the south-eastern corner of the town, the two great bastions known as the Trinidad and the Sta. Maria, and the curtain uniting them. In order that this might be done effectually, the Picurina must first be taken, and after the siege works had made sufficient progress, on the night of March 25, this work was stormed, and batteries constructed on its ruins. As the siege progressed, Soult drew near, and arrangements were actually made for leaving two divisions to hold the trenches, and marching with the rest of the army to give him battle. On April 6 however the breaches were reported practicable, Soult being still some way off; Badajos could therefore be assaulted with adequate force.