Jon Day gives a conservative estimate of Royalist casualties as 1,200 killed, wounded and sick, with another 800 lost to desertion. The siege had come close to succeeding, and by the end of it the defenders were down to their last barrels of gunpowder.
According to Jon Day's assessment, Royalist losses during the siege totaled around 1,200 wounded, ill, or missing, along with an additional 800 deserters. The siege was extremely close to achieving victory, and by its conclusion, the defenders had exhausted their last reserves of ammunition.