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APPENDIX. 
of making collections, on shore and afloat, and transmit them to the 
commander, or such person as he may designate, who will cause 
them to be cleaned or arranged for safe keeping, and lists will 
accompany them, with the name of the person who collected them. 
2d. All specimens, shells, &c., (in no case exceeding one hundred,) 
will be required if they can be obtained. 
3d. The cost of any article purchased will be refunded, should it 
be wanted by the government. Valuable and rare shells, seldom met 
with, will of course be retained by the government. 
4th. The naturalists will have every opportunity afforded them, 
of examining and describing any fish, shells, &c, as soon as taken. 
These arrangements will, it is hoped, produce the desired co-opera- 
tion, and will insure success; not only meeting the view of the 
country, but also holding out to individuals the only way in which 
they can be sure of procuring so desirable an end, as a complete 
collection of all those obtained by the different vessels. 
(Signed) Charles Wilkes, 
Commanding Exploring Expedition. 
U. S. Ship Vincennes, 
Orange Harbour, Terra del Fuego, 
April 18th, 1839. 
U. S. Ship Vincennes, 
Valparaiso, May 17th, 1839. 
Sir, 
I enclose herewith the general instructions relative to the collection 
and preservation of specimens, shells, &c, for the information and 
government of the officers of the Peacock, under your command. 
Some suitable person on board will be selected to preserve all 
articles that may hereafter be obtained. 
I wish to call the attention of the officers of the squadron to the 
duties required of them at every port we may visit, in relation to 
making and noting observations, &c. 
To each and all of us attaches the obligation, not only of making 
collections, but furnishing descriptions of foreign countries and 
people, their manners, customs, and inhabitants, their climate, soil, 
and productions, with the many instructive and interesting incidents 
which are afforded us. 
The government expects and requires this of all officers attached to 
the Exploring Expedition, in addition to their other duties; and I 
