Before entering on Cuellar's adventures on Irish soil, it may be as well to refer to an evident error into which Mr. Froude has fallen in his description of the wreck of the three vessels in Sligo Bay, in one of which Cuellar was. In the article before referred to, the following passage occurs: "Don Martin, after an ineffectual struggle to double Achill Island, had fallen back into the bay, and had anchored off Ballyshannon in a heavy sea with two other galleons. There they lay for four days, from the first to the fifth of September, when, the gale rising, their cables parted, and all three drove on shore on a sandy beach among the rocks. Nowhere in the world does the sea break more violently than on that cruel, shelterless strand," etc. Now, the facts disclosed by Cuellar's narrative, and by other contemporary writers, show that these Spanish ships were not at all near to Ballyshannon; but having been caught in the violent gales which were then raging round the coast, they were disabled, and being at the best of times unwieldy and difficult to steer, they drifted down from the north, and, failing to double Erris Head, were drawn into Sligo Bay, where they anchored about a mile and a half off shore, in the hope of being able to repair damages, and, when the gales subsided, proceed on their homeward voyage. Don Francisco Cuellar was captain of the _San Pedro_, a galleon of twenty-four guns, which belonged to the squadron of Castile. The account of Cuellar's adventures, as detailed by himself, are related in the letter to which reference has been made. This document was discovered in the archives of the _Academia de la Historia_, in Madrid, where it had lain in oblivion for three centuries. Passing over the first part of the letter, which relates his adventures in the _San Pedro_, which sustained great damage in an engagement with English vessels off the coast of France, being in a leaky and unseaworthy condition, owing to the number of "shot holes," the _San Pedro_, by order of the mate (Cuellar having retired to take some rest after the fight), moved a short distance away from the Admiral's ship, for the purpose of carrying out some repairs to the damaged hull. This action on the part of the _San Pedro_ raised the anger of the Admiral, who ordered Cuellar and another officer to be hanged at the yard's arm. Fortunately for Cuellar this unjust sentence was not carried out in his case, chiefly through the friendly offices of the Judge Advocate--Martin de Aranda.