As I told you, it was a numerical cypher, and by an elaborate system of experiments I had pretty well discovered what were the nulls and stops. The trouble was the key word, and when I thought of the odd million words he might have used I felt pretty hopeless. But about three o'clock I had a sudden inspiration.
The name Julia Czechenyi flashed across my memory. Scudder had said it was the key to the Karolides business, and it occurred to me to try it on his cypher.