A short time since, a British ship of war arrived at this place, the commander of which, (Edward Kittoe, Esq.,) upon being applied to by nine of our companions, who declared themselves to be British-born subjects, and being made acquainted with the circumstances which led to our capture, immediately sent on a petition to the Viceroy of this Kingdom in behalf of us all, but particularly for such as are British subjects, whom we expect will eventually be liberated. Nothing but humanity and a strong desire to relieve distress could have induced Captain Kittoe to this step, who, we are confident, as much as ourselves, regrets its failure of success, and to whom we feel every way indebted, and shall ever recollect it with gratitude and thanks. When your petitioners remonstrate against any harsh treatment of these people, they invariably ask, "Why don't your country liberate you?--it rests solely with them." Your petitioners feel confident, from the justness of their claim to the interference and protection of the constituted authorities of their country, measures will be adopted to restore them to liberty; and having no doubt but your honorable body will afford them that protection which citizens have a right to claim from their country, your petitioners beg that your honorable body will convey them an answer, and your petitioners, as in duty bound, will ever pray, &c. Robert Saunders, Benjamin Davis, Henry Sperry, Joseph Hickle, Ellery King, William Long, Daniel Newbury, Wm. Cartwright, Samuel Tozier, James Hyatt, Abram Head, Robert Stevenson, Samuel Price, Robert Reins, Hugh Smith, Benjamin Nicholson, Geo. Ferguson, Wm. Pride, Pompey Grant, David Heckle, Bennett B. Negus, John Moore, John M. Elliot, Henry Ingersoll, John Parcels, John Hayes, David Winton, Matthew Buchanan, Alexander Buchanan, Jas. W. Grant, John Edsall, Thomas Gill, Joseph Bennett, Phineas Raymond, Peter Nautly, Stephen Burtis. CARTHAGENA, August 12, 1808.