It appears from a discovery made by Oliver Curran, a Northern Irish historian, that a tribe of the Fortriu were also located at Newry, County Down: according to an 18th-century translation of Ptolemy's map of Ireland they are seen in the wider area marked "Voluntii" which he says corresponds with the "Cruithne" (Picts). It is not yet known whether other scholars will be convinced. There have also been Pictish 'Z' rod carvings and a settlement found on Trusty's hill at Gatehouse of Fleet, Dumfries and Galloway. There are also numerous cup and ring carvings and megaliths in the Machars and the Rhins of Galloway hinting at a migration route to Ireland.