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"And if they're still alive?"

"Well, scout around somehow. Do anything that occurs to you. This business ought to be rather fun, if we exercise a little ingenuity."

"Meanwhile, let's have another look at those documents. We don't seem to have made much out of them, and that's a fact."

They sat for several minutes in silence, re-reading the copy Reeves had made of the anonymous letter. It was undated; the address was in printed capitals; it had been postmarked in London at starting, and at Paston Whitchurch on arrival. The content of the message was a mere series of numbers, as follows:

"Unless they're sums of money," said Gordon, "I can't make head or tail of it all. And if they were sums of money, it would be a queer way to arrange the spacing."

"Wait one moment," said Reeves, "I believe I've got the idea of it." He put his hand to his