But Cuellar was no longer left in command of the _San Pedro_: he henceforward sailed in the vessel of the Judge Advocate, who was also styled Provost Marshal. Having passed round the north coast of Scotland, the vessel in which Cuellar was, in company with two other ships--all of large tonnage--encountered head winds and rough weather. Passing Tory Island, they were endeavouring to clear Erris Head on the Mayo coast; but the storms increasing, and the sea running high, they were unable to make that point. With shattered spars and torn canvas, and a weight of water in their holds, which the constant working of the pumps could hardly keep under, these vessels in a rough sea were unmanageable, and, drifting downwards, found themselves enbayed off the Sligo coast, where they hoped to find temporary anchorage. In the sailing instructions given by the Duke of Medina to the Spanish vessels on their return home, the following occurs: "The course that is first to be held is to the north-north-east, until you be found under 61 degrees and a half, and then to take great heed lest you fall upon the Island of Ireland, for fear of the harm that may happen unto you upon that coast. Then parting from those islands, and doubling the Cape in 61½ degrees, you shall run west-south-west, until you be found under 58 degrees, and from thence to the south-west," etc. These particulars are valuable in showing the direction in which the Spaniards endeavoured to navigate their unwieldy craft. Captain Duro in his book refers to the frequency of the opening of the seams in the old Spanish ships, which defect he attributes to the excessive weight and height of the masts, whose leverage in heavy weather caused a strain on the hulls which necessitated the constant employment of caulkers. [Illustration: _A Map of the West and North West Coasts of Ireland, Drawn in 1609. From the original in the British Museum showing the places connected with the Spanish Armada._ ]