This is an official public apology to Dave for our (entirely
unintentional!) plagiarism of his email for our footnote.  I forwarded
Dave's mail to my co-editor after receiving it, and he apparently thought
the wording was mine.  By the time it showed up in his draft of our
introduction I didn't remember the original mail and assumed the wording
came from my co-editor.  
Cutting, pasting, and forwarding can be risky ... sorry, Dave!  We'll just
have to read the article for ourselves...
cheers
Ann