In the year 1664, when another Dutch and French war broke out between them and Charles the Second, and able sea-officers were wanted for the fleet, Penrose (who as aforesaid for several years had been displaced) had divers letters sent to him from James Duke of York, and the Duke of Albemarle (formerly General Monk), by order of Charles the Second, requesting in this time of need that he would come up to London, accept of the command, and take the charge of the Monk frigate, in the Dutch war; which at length with some reluctance he accepted. In which post he discharged the place with such care and faithfulness as before he had done in the Parliament service. And, moreover, in the three sea-fights which the Duke of York and the Duke of Albemarle had with the Dutch fleets, (in all which he was commanded, though but a third-rate ship, to follow the admiral or general’s ships,) he behaved himself with such prudent valour and conduct (though with the loss of several hundreds of his men) that he preserved his ship, to the admiration of all that saw her, from destruction, though often boarded and surrounded with enemies. In brief, those matters are so abundantly set forth in the several letters of thanks, after those engagements, from the said Dukes and their Secretaries to Penrose, that if I should take the pains to transcribe them, they would only be thought a romance, as containing in them almost unparallelled adventures and dangers, which he most valiantly and successfully passed through, in the midst of seas, slaughter, fire, and bullets, were not the originals yet extant, and to be seen. Lastly, it appears from letters, and his Journal, which he kept daily for eighteen years’ space, which he spent at sea in the public service of his country, that in the year 1667 he was by Charles the Second made Admiral of a squadron of ships of sixteen men-of-war, which were ordered to cruise between Harwich and Newcastle towards the coasts of Holland, to watch the motion of the enemy. Where he received many letters by King Charles’s order from the Secretaries of State, War, and Admiralty, as also from the Dukes aforesaid (yet to be seen), containing thanks for his good service, and further desiring the continuance of his care, conduct, and watchfulness against the enemy, whensoever they should put out to sea again: in the mean time to observe such further orders as should be sent him.