424 APPENDIX. 



U. S. Ship Vincennes, 



At Sea, October 10th, 1839. 

 Sua, — 



You will proceed to the most western island of the Navigator 

 Group, called Savaii, passing on your route to the northward of 

 Upolu, and leave an officer at Apia, to take charge of and attend to 

 tide-staves hourly. 



From thence on your route you will proceed to Manono and 

 Apolima, ascertaining the distance between each of them and Savaii, 

 by the methods pointed out in my surveying instructions; you will 

 particularly examine Savaii for harbours, and will not allow any 

 Thing to escape you that will tend to give facilities to commerce and 

 navigation. 



Dr. Pickering will join the Porpoise for the purpose of procuring 

 every thing relative to its natural productions. You will land him 

 at the missionary settlement at Savaii, with an officer to attend to the 

 tide-staves hourly, until you leave that island. 



Lieutenant Alden, with a boat and crew from this ship, will be put 

 under your orders, for duty. 



You will return to the harbour of Pago-pago as soon as you shall 

 have finished, which will not detain your arrival beyond the 20th inst. 



If there are any of the crew of the Porpoise who are on the sick- 

 list, and unfit for duty, you will send them, with their bags and ham- 

 mocks, to this ship. 



As many specimens, sketches, &c, as possible, will be obtained as 

 usual by the officers ; also observations, &c, noted. 



The presents for natives will be exchanged for specimens, also fresh 

 provisions, &c, for the crew. 



Wishing you a successful cruise, 



I am, &c, 

 (Signed) Charles Wilkes, 



Commanding Exploring Expedition, 



Lieut. Com. C. Ringgold, 



U. S. Brig Porpoise. 



VI. 



U. S. Ship Vincennes, 



Harbour of Pago-pago, October 13th, 1839. 



Sir, — 



You will, with the Peacock and Flying-Fish under your command, 



