NRS 906 Colonial Secretary: Main series of letters received, 1826-1982 Letter from John Slater 21 March 1888 re his anti-torpedo inventions. 88/3779, in [1/2718B] plus photograph of the model ‘My Defensive Apparatus would Lie in the Water just as quietly as the Wire Netting until the Torpedo came pokeing around. And then there would be a Pow.’