Last summer we spent seven days with Mr. E. B. Bailey investigating some of the evidence upon which he bases his interpretation of the structure of the South-West Highlands, and we feel that our experience should be at the disposal of others interested in the subject. Mr. Bailey's full account of his theory will shortly appear in the Quarterly Journal of the Geological Society of London, and an abstract has already been printed in the Proceedings of that Society, dated April, 1921.