World Battlefronts: BATTLE OF THE ATLANTIC: Subs Southward

The best recent news of the U-boat war came last week from London. Britain's Production Minister Oliver Lyttelton reported that after a long upward curve Allied sea losses had decreased in July.

How much they decreased, Mr. Lyttelton did not say. Why they decreased, he did not say—and perhaps did not wholly know. But U.S. naval censors at last permitted the press to report one of the reasons for the drop, in one area where sinkings had been appallingly high. The reason: the Navy was convoying coastal shipping in the Western Atlantic, from Maine to Florida.

This did not mean that the...