Gutiérrez had the Canarias battalion blockade the pier so that Troubridge could not make any escape back, nor could any support come in. Two columns headed for the harbour, one behind the Sto. Domingo square in order to hinder the British advance inside the city and the other along the coast. In the morning, a convalescent Nelson attempted to reinforce Troubridge by sending 15 boats into the pier. At around 1:00 am, Spanish gunfire swept the small squadron. Three of them were sunk with more than 30 drowned, the rest rowed back shocked.