1. ‘He invented a Cryptograph or secret despatch writer, which is supposed to be indecipherable.’ ‘The new machine, called a Cryptograph, in receiving the message as originally written by the sender and enciphering it mechanically, eliminates the human factor of the code clerk.’

2. ‘He invented a Cryptograph or secret despatch writer, which is supposed to be indecipherable.’ ‘The new machine, called a Cryptograph, in receiving the message as originally written by the sender and enciphering it mechanically, eliminates the human factor of the code clerk.’