Interesting article in Vanity Fair on William J. Donovan:
http://www.vanityfair.com/culture/features/2011/03/wild-bill-donovan201103?currentPage=all
(Note the error in the photo caption. They seem to confuse Donovan with Lord Mountbatten)
There is a new biography of Donovan out last month: “Wild Bill Donovan” by Douglas Waller.
According to Victor (pages 32 & 47), Donovan received at least two specific warnings of the coming attack on Pearl Harbor.
These would be passed along to President Roosevelt during their regular meetings.