The location of the blasts on the vessels' hulls, the type of blast and other evidence suggest limpet mines, said the sources who had knowledge of the matter but who spoke on condition of anonymity.

Meek and mild mannered bookkeeper Henry Limpet has few passions in life. It's mid-1941 and he would love to join the Navy but has been rated 4F. His friend George Stickle is in the Navy and lays ...