Oghamwriting on standing stone, seen on the right-hand side of the picture.
This image was first published on Flickr.
Original image by Jessica Spengler. Uploaded by Jan van der Crabben, published on 11 May 2012 under the following license: Creative Commons: Attribution. This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered, in terms of what others can do with your works licensed under Attribution.