Each title is signed on the title page by the author.    Over the course of some time I saw the author on 5 occasions.   Included in this lot are event fliers from 4 of those.    

Matthiessen, Peter.   

African Silences.   Fine/Fine
At Play in the Fields of the Lord.  New York:  Viking,1956.    Fine/Fine.   Slight edge wear
Baikal.  New York:  Sierra Books, 19  .   Fine/Fine
Birds of Heaven.   New York:  Random House 1999.   Fine/Fine.   New.
Blue Meridian.  London:        19   .    First UK edition.    Fine/Fine.
Bone by Bone.  New York: Random House 19  .   Fine/Fine.   New.
The Cloud Forest.    New York:   Viking.  Very Good/Very Good
The Cloud Forest.  New York:  Bantam  First mass market paperback.  Fine
End of the Earth.  New. 
Far Tortuga.    Fine/Fine
In the Spirit of Crazy Horse. New York:  Random House 1976.  Fine/Fine.  A true first, bright vibrant color still to DJ.
Killing Mr Watson.   New York:  Random House  19  .   Fine/Fine
Lost Man's River.   New York:   Random House 1900.   Fine/Fine.  New.
Lost Man's River.    London:            ,1900. First UK edition.   Fine/Fine.  New.
Nine Headed Dragon River   Very Good/Very Good.
On the River Styx   Fine/Fine.   
Race Rock(The Year of the Serpent)  1954 Bantam First paperback pulp edition,   Condition only Good but unique edition.   
Sand Rivers.   New York:  Viking, 1981.  Fine/Fine.
Shadows of Africa.  New York:  Abrams, 1992 Fine/Fine
The Snow Leopard.   New York: Viking, 1978.  Very Good/Very Good.
Tigers in the Snow.   New York:  North Point Press  2000.   Fine/Fine.   New
Under the Mountain Wall.   Fine/Fine.  True first.  New York:  Viking,  1962.  Fine/Very Good
Wildlife in America.   New York:  Viking 1959 1st US edition.  No Dust Jacket.  Book is Fine
Downie, William.   Peter Matthiessen.
Peterson, Russell.   Rebel with a Conscience.  Newark:  University of Delaware Press.  1999. signed by Peterson and Matthiessen