Linguistic References
A New English Dictionary on Historical Principles (The Oxford English Dictionary). Oxford University Press. 1888 - 1933.
http://archive.org/details/ANewEnglishDictionaryOnHistoricalPrinciples.10VolumesWithSupplement
Webster, Noah. American Dictionary of the English Language. New York. S. Converse. 1828.
http://archive.org/details/americandictiona01websrich
Clark, William & Lewis, Meriwether. History of the Expedition under the Command of Captains Lewis and Clark, Vol. I. To the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean. Performed During the Years 1804-5-6. New York. 1814.
Project Gutenberg E-Book #16565
http://www.gutenberg.org/files/16565/16565-h/16565-h.htm
Thoreau, Henry. "Ktaadn, and the Maine Woods". Sartain's Union Magazine, July, 1848.
http://www.walden.org/documents/file/Library/Thoreau/writings/mainewoods/KtaadnSartain's.pdf