Admiral Greig next distinguished himself against the Swedes, whose fleet he blocked up in port, whilst he himself rode triumphantly in the open seas of the Baltic. Several days after winning the Battle of Hogland, he was attacked by a violent fever, and having been carried to Reval, died on 26 October 1788, on board of his own ship, "Rostislav", after a few days' illness, in the 53rd year of his life. As soon as the empress heard of his illness, she, in the utmost anxiety about a life so valuable to herself and her empire, instantly sent for her first physician, Dr Rogerson, and ordered him to proceed immediately to Revel and to do every thing in his power for the admiral's recovery. Dr Rogerson obeyed, but all his skill was unavailing.