Why is Nine mile house called so ?
Because it is 9 Irish miles from Kells.
Keep in mind that the Irish mile would have been over 2000 meters in 1778 ! Today a mile is just 1609 meters
Original image in below link http://www.thekennygallery.ie/gallery/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=10712&category_id=581&option=com_virtuemart&Itemid=32
More info on miles from Wikipedia at http://en.wikipedia.org/wiki/Mile#Irish_mile