Is This Letter From Lancaster Ohio ?

Hello,
please have a look at the scan. I want to identify the cancel and in my opinion it is from Lancaster Ohio. Is it the letter O under the 8?
The letter comes in this exact form from a dealer in Prague, Czech Republic.
Thank you all!

Yes, the "O" represents "OHIO". According to the American Stampless Cover Catalogue (1997) the cancel was used from 1833 - 1853. The 5c unpaid rate was in effect from July 1, 1845 through April 1, 1855 when prepayment became obligatory. Catalog value of the cancel is $15.00

Glenn Estus#8232; President, Vermont Philatelic Society

http://www.vermontps.org

editor, The Vermont Philatelist

First Day Columnist, Stamp Insider http://www.stampinsider.org

http://empirestatepostalhistory.blogspot.com/

http://nypostalhistory.blogspot.com/

http://vermontpostalhistory.blogspot.com

Yes. Definitely Lancaster, Ohio. In fact, the return address (inverted on the cover scanned) is of Samuel G. Foster, who was employed as an engineer in connection with the building of the former Hocking Canal:

http://en.wikipedia.org/wiki/Hocking_Canal

To confirm what others have said, it is Lancaster, Ohio. ["O" was a standard abbreviation for Ohio for most of the stampless period, though some postmarks do fully spell the state name].
Lancaster was and is the seat of Fairfield County and a substantial early settlement; it's a common marking but may be of interest for the content.

Matt Liebson
President, Ohio Postal History Society

The addressee of the cover, Oran Follett, Esq., was of some prominence as well:

Thank you all for the interesting information .
Now I must confess I got the cover for a virtual collection of cancels only.
After the complete input the cover will not be needed any more.
Who of you above wants to get it? Free - but only after the input which might last from weeks to months depending on who is the 2nd person to OK the input.
If more than one wants it, I'll have to decide (do not know yet how?).
Scan of the contents of the letter is enclosed.

I would urge you to keep the cover and the letter together. Each supports the other as an interesting historical document where the two together, each providing supporting information for the other, mean far more than if they were split up individually. It would be a great shame if these were split up now, after making it through 150 years of not being split apart as so many other letters of this period have been. Future generations of collectors would be deprived. We should all consider ourselves as temporary caretakers of such letters and covers.

Hi Kimo and all the other interested
Sorry that due to my bad English I gave a wrong description of the letter.
There is no cover. It is, as was quiete usual in those times, a folded letter with the contents on the "inside" and the address and sender on the other side. So it is all in one piece.
I still offer it.