expected northeast quarter, coupled with a strong southward current, caused her to lose ground on every tack until, on 6 January 1833, she entered what enquiries disclosed to be the Vung-lam harbor of Phu Yen province. On 8 February, Roberts having failed to gain permission to proceed to Hué due to miscommunication, Peacock weighed anchor for the gulf of Siam, where on the 18th she anchored about from the mouth of the river Menam at , as was ascertained by frequent lunar observations and by four chronometers. On 20 March 1833 Roberts concluded the Siamese-American Treaty of Amity and Commerce with the minister representing King Rama III, and Peacock departed on 5 April to call on Singapore, where she stayed between 1 and 11 May. On 29 August in the Red Sea, while bound to Mocha, Peacock encountered Nautilus, the same brig Peacock had attacked after the end of the War of 1812 with Great Britain. Nautilus was sailing to Surat as escort to four brigs crowded with pilgrims returning from Mecca. This time Peacock did not attack Nautilus. Arriving 13 September off Muscat, Roberts concluded a treaty with Sultan Said bin Sultan, and departed on 7 October 1833. On the voyage from Muscat to Mozambique, Roberts omitted the particulars of each day, but stated that what he had written served "to show the absolute necessity of having first-rate chronometers, or the lunar observations carefully attended to; and never omitted to be taken when practicable."Peacock returned Roberts to Rio de Janeiro on 17 January 1834, where on 1 March 1834 he boarded Lexington to return to Boston. Return mission On 23 April 1835, Peacock, under the command of C. K. Stribling, and accompanied by U.S. Schooner Enterprise, Lieutenant Commanding A. S. Campbell, departed New York Harbor. Roberts was once again aboard Peacock, and the two vessels were under the command of Commodore Edmund P. Kennedy. The mission first sailed to Brazil, then round the Cape of Good Hope to Zanzibar, for Roberts to return ratifications of the two treaties. Masirah incident On 21 September 1835 at 2 am southeast of Masirah Island about from Muscat, Peacock grounded on a coral reef in about 2 1/4 fathoms (2.28 meters) Mr. Roberts, and six men under the command of Passed Midshipman William Rogers, left in a small boat to effect a rescue. The crew hove overboard 11 of 22 guns, re-floated the