A series of diplomatic exchanges then took place. The Falkland Islands Governor and subsequently the Foreign Office passed a message back to the BAS team for passing to the captain of the ARA "Bahia Buen Suceso". This was to the effect that the Argentine flag must be taken down and that they must report to the British administrator (Mr Stephen Martin, commander of the British Antarctic Survey Base) at Grytviken, to have their passports stamped (which they refused to do as it would acknowledge British sovereignty over the islands). Although the flag was lowered and the "Bahía Buen Suceso" departed, a party of men were left behind. On 21 March, HMS "Endurance" set sail with a party of 22 Royal Marines to expel the men who remained at Leith, but to avoid further tensions, the Foreign and Commonwealth Office (FCO) ordered "Endurance" to hold off.