Paul I'm afraid that this link is of little help. The land bridge on the map is from southern Ireland to southern England and was essentially destroyed 12000 years ago when the Irish Sea flooded. Ulster was still under ice then. I can't find a reference to a later land bridge between County Down and Scotland and I'm confused as to how it could have existed if a 200 metre deep trench lay in between. A link between Inishowen to Islay as suggested by Iain's message is much more plausible since it would involve the shallower portion of the North Channel. If it really existed, it would be nice to have a scientific opinion at to its dates before we conclude it is irrelevant. John -----Original Message----- From: dna-r1b1c7-bounces@rootsweb.com [mailto:dna-r1b1c7-bounces@rootsweb.com] On Behalf Of Paul Conroy Sent: October-07-11 1:08 PM To: dna-r1b1c7@rootsweb.com Subject: Re: [R-M222] Location of land bridge between Scotland and Ireland Ian, There's a rough map of the Land Bridge here: http://www.wesleyjohnston.com/users/ireland/past/pre_norman_history/iceage.h tml My point was that the land bridge was irrelevant, this was one breeding population, sharing the same culture and language R-M222 came much later, and probably from the Continent, and if I'm correct probably came in more than one stream to Ireland, as Southern and Eastern R-M222 may not be related closely to the main body of Northern R-M222. Cheers, Paul On Fri, Oct 7, 2011 at 12:49 PM, Iain Kennedy <ikennedy_msdn2@hotmail.com>wrote: > > Paul, > That's what I thought too. I flipped through Bardon just now and he > says on > p4 > > 'although rising sea levels had severed Ireland from Britain - the > last land bridge is thought to have run from Inishowen to Islay - > geologically they remained closely linked, especially in Ulster'. > The claim is not referenced unfortunately. Has anyone come across any > such claim before? > Iain > > >