According to the captured Lord Bernard, although he did not know exactly when the fleet had set sail, he could confirm that they did and that judging by the rough timeline, they should be getting near.
This was enough to set a furious fire under Alexander.
He wasted little time ordering his army to make haste, even commanding them to leave most of their supply wagons and siege equipment behind with the servants.
The possibility of impending enemy reinforcement was too great to ignore.
Of course, the best case scenario would be for the relief force to get swallowed up by some disaster at sea, thus allowing Alexander to take his sweet time here.
And his hopes for this were not too exaggerated either, as in this era, the chances of wooden ships getting overtaken by the waves were so common that it was hardly worth commenting.