Out of a Sangamon County, Illinois, collections, but as to 'type', people, I've sort of struck out. The piece has spent the last month or more on my computer monitor stand so that every day I can try to think of "similar types" (my way of classifying the more hard-to-pin-down pieces). I'm no closer now than back in September. To start off with what I DO know: Crescent Quarry Chert (high grade/ silicate Burlington)--length is 2&13/16" by 1&1/8" by 5/16" max thickness. The blade was made from a large flint flake--some areas of the body have no flake scars, so very obviously the ancient knapper (whichever culture made it) started with a flint flake, not a bi-facial preform. That lets out much of the Early Archaic material as those peoples started with something like a Cobbs Knife, a bi-facial 'knife'. Here, the basal edge is very lightly ground--but there IS grinding. The blade isn't quite symmetrical, but that may be due more to the flint flake that was worked. I have deliberately not washed the flint--you see it exactly as I've been studying it. If you can figure out a name, well, "Good luck, we're all counting on you"...as the movie says. Shipping is $8.00, USPS minimum, and checks, cash, or M.O>s are welcomed. Sorry, I have no dealings with paypal--Roy A.