notice that ‘July 17th’ is quite different in this respect. Do you see what I mean?”

“No,” I confessed, “I don’t.”

“You do not see that that letter was not written on the 17th, but on the 7th—the day after Miss Howard’s departure? The ‘1’ was written in before the ‘7’ to turn it into the ‘17th’.”

“But why?”

“That is exactly what I asked myself. Why does Miss Howard suppress the letter written on the 17th, and produce this faked one instead? Because she did not wish to show the letter of the

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