"
_Geology of New York Island_.--"I wish you to give me an article on the
mineralogy and geology of Manhattan Island, in the form of a letter
purporting to be by a foreign traveler. (See Appendix, No. 2.) It is my
intention to give a series of letters, partly by myself and partly by
others, which shall take notice of everything in and about the city
which may be deemed interesting. I wish to begin at the foundation by
giving a geographical and geological sketch of the Island."
_Indian Biography_.--"Colonel Haines also wishes you to unite with him
and myself, in writing a series of sketches of celebrated Indians."
Professor Silliman writes (Jan. 20th), acknowledging the receipt of a
memoir on the fossil tree of the River Des Plaines, which was prepared
for the American Geological Society. He requests me to furnish him a
copy of my memoir on the geology of the regions visited by the recent
expedition, or, if it be too long for the purposes of the _American
Journal_, an abstract of it.
_Animal Impressions in Limestone_.
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