The earl's stay on board was but a short one.

As soon as he had learned the whereabout of the rest of the fleet, and given instructions to Captain Price, he again embarked in the felucca, and sailed for Sitjes.
The joy of the troops was great at the return of their general, for the night had been so stormy that there were great fears for his safety; but he was not to remain with them long, for, having given orders that the whole disposable force, about fourteen hundred men, should embark in the boats before daybreak next morning, and follow the fleet to Barcelona, he again with his aides de camp took his place in the felucca and sailed for the fleet.
In the middle of the night he came across them, and boarding the Prince George, hoisted his flag as admiral of the fleet on the maintop, and took the command.

He then sent a boat to Sir John Leake to acquaint him with his orders and intentions, and another boat to advise General Stanhope of his arrival; but the darkness delayed the delivery of these messages till nearly morning, and when day appeared the whole fleet was amazed at seeing the flag of the admiral in chief flying on the Prince George.

The wind was strong and favorable, and the fleet crowded on all sail; but when within about eighteen miles of Barcelona one of the French lookout ships sighted them, and made a signal to a consort further along.

She in turn passed on the news until it reached the Count of Toulouse, who, without waiting to ascertain the strength of the approaching squadron, at once signaled to his fleet to weigh anchor, and, putting to sea, sailed for France.
The disappointment of the earl was great, as he had fully calculated upon gaining a great naval battle in sight of the city he had come to relieve.