The Allies learned about the German V2 rockets. Hollanders on liberated Walcheren island told of the German’s careful guarding of V-2 launchings.

How much the Allies had managed to learn about the ingenious German enemy’s devilish V-2 rocket bomb was a security secret last week. But it was no secret that they believed they knew one source of its superspeedy power: its fuel. They did something about it.

In sleet-streaked weather a…