APPENDIX. 439 



your latitude daily by meridiau observations or double altitudes ; 

 and also sights for your chronometers morning and evening. 



You will make a rough diagram or chart as you proceed, distinct 

 from your note-book, noting thereon the latitude and longitude of 

 the principal points. 



Each boat will keep a log of her proceedings, in which the results 

 of observations for latitude and longitude will be inserted, showing 

 the positions of your boats at noon, their anchorage at night, and 

 the spot from which they get under way in the morning. 



You will communicate these instructions to Mr. De Haven. 



I am, &c, 



Charles Wilkes, 



Commanding Exploring Expedition. 



P. S. The boats will always be kept within signal distance, and 

 separated only in cases of necessity for a short time. 



Respectfully, &c, 



C. W, 

 Lieutenant O. H. Perry. 



IX. 



U. S. Schooner Flying-Fish, 



Somu-somu, June 10th, 1840. 



Sir, 



You will examine and survey the island of Somu-somu, by the 

 south around to the northeast point ; thence by the island off Hat and 

 Cap Islands, and thence to the islands and reefs to the northward, as 

 far as the island or reef called Farewell Island. You will return 

 toward the north end of Somu-somu, surveying the islands and reefs 

 in your way to the harbour of Tubou, to the north of this anchorage. 

 From thence to the opposite shore of Vanua-levu, taking up Mount 

 Cocoa-nut and its points, and, proceeding to the northward and west- 

 ward, the boats carefully examining the reefs and bays for harbours, 

 as far as the bay of Mali, when you will enter the reef, and proceed 

 to the anchorage near Kie, or Muthuata, on the chart, where you 

 will meet me, or orders. 



On your arrival at Muthuata, your work will be brought up, and 

 the notes or deck-board agreeably to formula, and a rough chart of 

 your surveys furnished me, together with your report up to that time. 



If you should, on your way to Muthuata, meet any of the boats 



