416 APPENDIX. 
XXVII. 
U. S. Ship Vincennes, 
Orange Harbour, Terra del Fuego, 
February 22d, 1839. 
Sir, 
The tender Flying-Fish, placed under your charge, will be attached 
to the Peacock, and under the orders of Captain Hudson, during the 
present cruise. 
1st. I cannot impress too strongly on your mind the necessity of 
avoiding, under any circumstances, parting company with the Pea- 
cock, as the safety of all on board that vessel may be hazarded 
thereby ; every means will be taken therefore to prevent a separation. 
2d. You will keep a strict daily journal of every occurrence 
relative to your co-operations with that vessel. 
3d. A skeleton chart is furnished you, comprising the latitudes and 
longitudes in which you will cruise, and on which chart an accurate 
track must be laid down of the route, daily ; also, the positions of all 
lands, islands of ice, &c, which may be observed. Astronomical 
bearings, when the weather will permit, are preferable for this 
purpose. 
4th. You will also enter on your journal, the variation of the 
compass, morning and evening ; sketches of refractions, and minute 
observations of all phenomena that may be seen ; also, sketches of the 
stratification of ice, temperature of the water on the weather and lee 
sides of the islands, the form and direction of currents, and the 
apparent formation of the ice ; also, the collection and preservation of 
any stones, specimens of earth, &c, that may be discovered on the 
ice, and the appearance of any halos, auroras australis, &c. 
5th. If you should unfortunately be separated from the Peacock, 
the following rendezvous are fixed by Captain Hudson, for meeting 
again, if possible : 
1st. Latitude 62° S., longitude 80° W., to wait half a day. 
2d. " 64° " 90° « one " 
3d. " 65° " 100° " " " 
4th. " 66° " 105° " " « 
And you will seek the nearest to the above named, coasting along 
