The first drafts of these essays appeared in the _Australasian Medical
Journal_, _The Sydney Bulletin_, the Australian _Home, Art in Australia_,
and the Australian _Forum_. They have nearly all been considerably
modified with the growth of knowledge and frequent rewriting. I have to
thank Miss Kibble, of the New South Wales Public Library, for assisting
me immensely in hunting up many authorities from whom I quote. Without
her help this book could never have been written.