I have a question relation to correcting a pre-1923 edition with a post 1923 edition. I know that where the corrections are minor this is OK. But what if the post-1923 edition adds a few footnotes to the text, by an editor. Are these OK to add in? In addition, what happens if the pre-1923 edition is a severely edited version of the true work, which, although written in the 1860's, only saw publication in full in the 1960's. I realise that the new introduction, notes etc. by the editor cannot be included, but is the text OK? These questions occurred to me as I examined the 3 editions of the Autobiography of Charles Darwin. His views on religion were so distasteful to his family that they were elided from the text, and not available in print for a century! Regards Tom Harris BeacyBooks beacybooks@bigpond.com