Google now has about 5m books in their online library and they are searchable by the period in which they were written.
Entering the term "handicapping" yields this result:
ngrams.googlelabs.com/graph?content=handicapping
Clicking on the boxes below the graph gives a list of books from that period, just click on the search result to see the book.
ex:
books.google.com/books?id
Not all books are viewable, but many are. For free. I just ran across this so that's about all I know.
Thanks.
WOW
