The cut leather surrounding the holes would have been tied around the wooden branches of the A-frame with finer strips of leather.
The sails would have likely been made from the skins of the giant irish reindeer with the skins being scraped clean and sewn together.
A coracle was placed on top of the gripper bar raft which was tied down to the corners of the raft with leather rope.
The coracle may have had small holes in it to allow for a paddle rudder mounted on an A-frame to steer the raft.
These giant irish riendeer likely stayed close to the ice-capped mountains of the Pyrennes and when the weather got warmer, they headed toward the glaciated mountain caps of the Swiss alps.
The warm period came to an end about 11 000 years ago and a mini ice age followed lasting some centuries, during which the still present glaciers recovered some of thier lost ground.
12 000 years ago the giant irish deer which these hunters hunted in southern France were becoming scarce and these hunters knew this.What these were made of is uncertain, however it's quite possible that they used large logs made from oaks or pine that were doubled on top of one another where they were tied down with soft springy saplings that were split lengthwise and bent over the logs horizontaly to the top and the underside.These springy saplings with pliability were then tied at the ends together with leather similar to how a gripper bar raft is made.The first and most important of these bases established was likely on Orkney, which has the longest record of continuous settlement of the British Isles and has rich archaeological sites to prove it.The traditional view of the origin of the Picts is that they started out settling the other islands from Orkney as is written by Bede in "The Eclesiastical History of the English People" (731 A. It was also roughly the half-way point between the Basque country and Finnmark.The people sent there over the centuries came from either the Bay of Biscay or from the western coasts of Ireland which they may have used as a repair and resting staion.