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"'Pon my word, Watson, you are coming along wonderfully. You have

really done very well indeed. It is true that you have missed

everything of importance, but you have hit upon the method, and

you have a quick eye for colour. Never trust to general

impressions, my boy, but concentrate yourself upon details. My

first glance is always at a woman's sleeve. In a man it is

perhaps better first to take the knee of the trouser. As you

observe, this woman had plush upon her sleeves, which is a most

useful material for showing traces. The double line a little

above the wrist, where the typewritist presses against the table,

was beautifully defined. The sewing-machine, of the hand type,

leaves a similar mark, but only on the left arm, and on the side

of it farthest from the thumb, instead of being right across the

broadest part, as this was.