Cheers for that - I'm not sure what the boolean search really is. I tend to use combinations and permutations of exact phrases - examples in this case being:
"William O'Neil" + "84 Madison" + "Died"
or
"O'Neil" + "Madison St(reet)" + "Died" + "1876"
PS don't get me started on the permutations I've tried for 113 East 12th Street !!!
Thanks for the link by the way - I see google are building up a collection too.