On the 11th of March, 1807, Bensley invited Koenig to meet him on the subject of their recent conversation about "the discovery;" and on the 31st of the same month, the following agreement was entered into between Koenig and Bensley:-- "Mr.Koenig, having discovered an entire new Method of Printing by Machinery, agrees to communicate the same to Mr.Bensley under the following conditions:--that, if Mr.Bensley shall be satisfied the Invention will answer all the purposes Mr.Koenig has stated in the Particulars he has delivered to Mr.Bensley, signed with his name, he shall enter into a legal Engagement to purchase the Secret from Mr.
Koenig, or enter into such other agreement as may be deemed mutually beneficial to both parties; or, should Mr.Bensley wish to decline having any concern with the said Invention, then he engages not to make any use of the Machinery, or to communicate the Secret to any person whatsoever, until it is proved that the Invention is made use of by any one without restriction of Patent, or other particular agreement on the part of Mr.Koenig, under the penalty of Six Thousand Pounds.
"(Signed) T.Bensley, "Friederich Konig.
"Witness--J.

Hunneman." Koenig now proceeded to put his idea in execution.

He prepared his plans of the new printing machine.

It seems, however, that the progress made by him was very slow.

Indeed, three years passed before a working model could be got ready, to show his idea in actual practice.