In the event of the enemy's squadron getting out of Cadiz undiscovered, either before or after your arrival off that place, you are to follow it, according to any well-grounded intelligence you may be able to obtain of it; but you are not to proceed in quest of it to any distant station, unless you should receive such information as shall leave no doubt of the certainty of the enemy's destination. If you should not be able to obtain any information of the enemy's squadron so as to enable you to follow it, you are in that case to repair with the ships under your command off the Straits, and send into Tangier and Gibraltar, and, finding that it has proceeded up the Mediterranean, to follow it; but, not gaining any intelligence of it, you are to resume your station off Cadiz, and remain there until you shall receive some information whereby your proceedings may be regulated.
And whereas it has been represented to us that three Portuguese ships of the line are now fitting out in the Tagus for the purpose of joining you and serving under your orders, you are, on the arrival of the said ships, to take them under your command, and employ them in such manner as you may judge most advisable in carrying these, or any other orders you may receive from us or from Admiral Lord Keith, (under whose command you are to consider yourself,) into execution. And whereas we have directed Admiral Sir Thomas Pasley to order one of the hired brigs, and either a cutter or lugger, to follow your orders; you are to take the commanders of these vessels under your command, and, on your repairing to your station, you are to send one of them into the Tagus for the purpose of apprizing his Majesty's minister there of your situation, and for obtaining from him such intelligence as he may have to give you.
Whilst you remain on this service, you are to send occasionally to Lisbon for intelligence, and to keep a good look-out for any French squadron which may attempt either to join the Spanish ships at Cadiz, or to pass through the Straits; and to use your best endeavours to intercept, and to take or destroy it, if the force you may have with you should be sufficient to enable you to do so; taking care to avoid it in time, if the enemy's force should be so superior to that under your command as to render it improper for you to attack it; in which case it is left to your discretion to act as circumstances shall require: using, however, every possible exertion to join the commander-in-chief of his Majesty's ships in the Mediterranean, or to fall in with the same detachment of his Majesty's ships; and, so soon as you shall have collected such a force as may be sufficient to enable you to attack the enemy's squadron, you are to proceed in quest of it, and, upon falling in with it, to bring it to action.