John R Collis: You may want to read my book "Celts: origins myths and inventions" to find out why Celtic languages are called Celtic, etc. I am hoping to bring out a new book looking at where we have got to with the rethinking of the Celts, and my latest article is: The Sheffield origins of Celtic Art. In C. Gosden, S. Crawford and K. Ulmschneider (eds.) Celtic Art in Europe: making connections: essays in honour of Vincent Megaw on his 80th birthday. Oxford, Oxbow Books. Pp. 19–23 and Plates 2 and 4. One bit is out of date - Daniel Wilson was the first to use the term in 1851, but in a very different way from later authors.