He said
nothing about the "suicide" as he quietly began a new line of
accumulating evidence.
"There is an increasing use of the typewriting machine for the
production of spurious papers," he began, rattling the note
significantly. "It is partly due to the great increase in the use
of the typewriter generally, but more than all is it due to the
erroneous idea that fraudulent typewriting cannot be detected. The
fact is that the typewriter is perhaps a worse means of concealing
identity than is disguised handwriting. It does not afford the
effective protection to the criminal that is supposed. On the
contrary, the typewriting of a fraudulent document may be the
direct means by which it can be traced to its source. First we
have to determine what kind of machine a certain piece of writing
was done with, then what particular machine."
He paused and indicated a number of little instruments on the
table.
"For example," he resumed, "the Lovibond tintometer tells me its
story of the colour of the ink used in the ribbon of the machine
that wrote this note as well as several standard specimens which I
have been able to obtain from three machines on which it might
have been written.
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