NH9857 : Rodney's Stone RHCMS literature says the stone bears three Ogham inscriptions, one of which (to the right of the cross) transliterates EDDARRNON; the name 'Ethernan' is recorded in THE ANNALS OF ULSTER referring to a Pict who died in AD669.
For the Ogham alphabet see
http://www.omniglot.com/writing/ogham.htm Can anyone spot this inscription? So far I cannot.