 On 16 June 1809 Agamemnon , along with the rest of the squadron ( which was now under the command of Rear @-@ Admiral Michael de Courcy ) , put in to Maldonado Bay for the third and final time , to shelter from a storm . While working her way between Gorriti Island and the shore , Agamemnon struck an uncharted shoal . Captain Jonas Rose attempted to use the ship 's boats , together with the stream and kedge anchors , to pull the ship off , but to no avail . The ship had dropped anchor on the shoal just previously , and it was discovered that she had run onto it when she grounded , the anchor having pierced the hull . On 17 June , with the ship listing heavily to starboard , Agamemnon 's stores and all her crew were taken off by boats from other vessels in the squadron , and the following day Captain Rose and his officers left the ship . 
