Encyclopaedia Britannica Challenge

I accepted the Encyclopaedia Britannica Challenge a few months ago.   This involved having volume 21 which I need work with to create an altered book.  This is quite a well established kind of art form now and I have experimented a little in this in the past.  An exciting prospect...but what to do?

I considered all kinds of possibilities, but this warm summer I have been swimming a great deal and  I had also made drawings and created prints of butterflies a couple of years ago for a book (Shropshire Butterflies edited by Nadia Kingsley).  So, on seeing the section on SWIMMING in my volume and thinking about 'Swimming the Butterfly' I started....