The rain continues to be a problem, with both sides musketry utterly pitiful and the French cannon equally useless in the main.
On the Spanish Left, steady advance up the wooded slopes continues slowly, the terrain rendering movement at half speed and inflicting disorder at every move. In the centre, the Spanish 1st Division pressed hard against the Brigade holding the French line, repeated bayonet and close musketry attacks on both sides causing attrition that could only end in one way, the French Brigade losing a unit and being forced back, all remaining units left in a precarious state of 1 CV each. It hadn’t been easy for the Spanish though, and most of the 1st Division were now in perilously low CV as well.
It was at this point that Blake issued an order to attack to the 4th Division who’d been behind “supporting” the 1st Division. They were to punch through the French left. The Legere on the slopes were not worried by this though and continued to tie up several Spanish units in futile musket duels that the Spanish were inevitably losing although not without cost for the French. Slowly, the casualties mounted on both sides, several Spanish attempts to charge up the slope met with close order volleyfire and heavy loss.
Finally a battalion of the Legere were dispersed but the damage had been done and the rest of the Spanish were not in a position to follow up and take advantage, or possession of the slopes.
On the French left the battalions of the line regiment pushed up into the gap before them and attempted to slow the assault of the Spanish 4th Division. This they succeeded in doing, dealing some hefty casualties to several Spanish militia battalions and counterattacking to drive off several battered Spanish units from the 1st Division.
At 1pm, the Spanish 1st Division finally broke, it’s remaining units streaming to the rear. Neither the 3rd or 4th Divisions gave any sign of weakening, but the French left brigade also broke, several of its battalions melting away into the rain. Gen. Blake looked across his forces, took stock of his position and the lack of any sign that his reinforcements were coming and elected to fall back while he still had troops in good order to fend off the two French Light Cavalry Regiments that had so far been uncommitted in the battle. These cavalry pursued his forces for several hours, inflicting more casualties and disorder amongst his units but not without losing a few of their own number. This was not a rout however, but a covered withdrawal.
For now, the siege of San Sebastian continues, it’s residents dismayed that the sounds of battle grow more distant than closer…