Cumberland County (New York) was in what is now southeastern Vermont. It was divided out from Albany County in 1770. See a map showing it at:
http://freepages.genealogy.rootsweb.com/~vermontgenealogyresources/Maps/Sm1772.jpg
It disappeared from the scene when Vermont obtained its independence from the rival claims of New York and New Hampshire.   
Wynamick doesn't ring any bells (I used to live on those parts), but you should probably look for it in southeastern Vermont.

Hugh C. MacDougall
Secretary/Treasurer
James Fenimore Cooper Society
8 Lake Street, Cooperstown, NY 13326
[log in to unmask]
http://www.oneonta.edu/external/cooper 
  ----- Original Message ----- 
  From: Tim Frank 
  To: [log in to unmask] 
  Sent: Monday, May 20, 2002 8:33 PM


   

   

  I am doing some family history research and have uncovered a reference to the County of Cumberland, in New York Province.

  This is from the United Empire Loyalist claim of an ancestor, and dates to just after the Revolutionary War, c.1779, the ancestor would have lived there approx. 1766-1786.

  I have been unable to find any references to this area.

  The County of record at that time was Tryon I believe.

  There was also a reference to what appears to be a town or settlement; it is an old hand-written document, but seems to read " Wynamick"

   

  Does this ring a bell with anyone?

   

  Tim Frank