Steven Lynch digs up an interesting bit of trivia about batsmen who could not be out bowled:
The rather unlikely name at the top of this list is Courtney Browne, the recent West Indies wicketkeeper who has just been named as a selector. He had 30 innings in Tests, six of them not out, and was never bowled. [..] Pakistan’s Rashid Latif, a wicketkeeper like Browne, had 57 innings and was only bowled once.
I wonder if wicketkeepers are less liable to be bowled, perhaps because they are trained to call the play early. This would mean they know what kind of ball was coming, but not necessarily how to play it.