Iron cannon of 18 pounds (Regulation of 1783) and three bodies recovered from the wreck of the Magdalena frigate sunk in the estuary of Viveiro on 2 November 1810. It was casted in the Royal Artillery Factory in Cavada (Cantabria ). He belonged to the ship "San Julian" and the commander of the "Magdalena" requested a change of 12 pounds for 18 pounds in 1784. It measures 2480 mm long, has a maximum diameter of 148 cm and 95 cm minimum and weighs 2208 kg.