Sherlock Holmes sprang out of his chair as if he had been
galvanised.
"What!" he roared.
"Yes, to-day." She stood smiling, holding up a little slip of
paper in the air.
"May I see it?"
"Certainly."
He snatched it from her in his eagerness, and smoothing it out
upon the table he drew over the lamp and examined it intently. I
had left my chair and was gazing at it over his shoulder. The
envelope was a very coarse one and was stamped with the Gravesend
postmark and with the date of that very day, or rather of the day
before, for it was considerably after midnight.
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