"To all our Lieutenants, Castellains, Captains, Condottieri, Officers, Soldiers and Subjects, to whom these presents may be known, we commit and command that to our Most Excellent and Most Beloved Private Architect and General Engineer Leonardo Vinci, bearer of the same, and who has our Commission to survey the holds and fortresses of our States, in order that according to their exigencies and his judgment we may equip them, they are to give free pass, exempt from all public toll to himself and his company, and friendly reception; and to allow him to see, measure and estimate all he may wish. And to this effect they shall order men on his requisition and lend him all the help, assistance and favours he may request, it being our wish that for all works to be done in our Dominions any engineer be compelled to consult him and to conform to his opinion ; and to this may none presume to act in opposition, if it be his pleasure not to incur our indignation."