and in early 1659 was sent to mediate between Sweden and Denmark; however, he was suspected of secret communication with the exiled Charles II and the republicans Algernon Sidney and Sir Robert Honywood were sent to monitor his activity. He was recalled and investigated by the newly installed Rump Parliament; although no evidence was found, he was dismissed from command. Restoration By the end of 1659, England appeared to be drifting into anarchy, with widespread demands for new elections and an end to military rule. In February 1660, George Monck, military commander in Scotland, marched into London and declared his support for the Rump against the Republican faction led by John Lambert. Montagu resumed command of the navy and was returned as MP for the important port of Dover when elections were held for a Convention Parliament in April. This placed him in a powerful position during negotiations for the Restoration; when Parliament resolved to proclaim Charles king and invited him to return to England, Montagu commanded the fleet that brought him from the Dutch Republic on 24 May. Two months later, on 12 July 1660, he was created Baron Montagu of St Neots, Viscount Hinchingbrooke, and Earl of Sandwich. King Charles also made him a Knight of the Garter and appointed him Master of the Great Wardrobe, Admiral of the narrow seas (the English Channel and southern North Sea), and Lieutenant Admiral to The Duke of York, Lord High Admiral of England. He carried St. Edward's staff at Charles' subsequent coronation. Edward Hyde, 1st Earl of Clarendon, who liked and admired Sandwich, wrote that the conferring of these honours caused much resentment among those Royalists who had gone into exile with their King, and regarded Sandwich as a "diehard" Cromwellian; yet adds that his charm of manner made it almost impossible to dislike him. He was appointed Ambassador to Portugal in 1661, and strongly favoured the Portuguese marriage, through which England obtained Mumbai and Tangier. Sandwich, like others, saw a great future for Tangier as an international trade centre, and he commanded the fleet which took possession of the city in January 1662, purchasing a house there. Returning to England, in his capacity as Ambassador, he escorted the new Queen, Catherine of Braganza, from Lisbon. Montagu was a signatory to The Several Declarations of The Company of Royal Adventurers of England Trading into Africa, a document published in 1667