'We entrust to you an important office, the care of the gate of such and such a city. Do not keep it always shut--that were to turn the city into a prison; nor let it always lie open--then the walls are useless. Use your own judgment, but remember that the gate of a city is like the jaws of the human body, through which provisions enter to nourish it.' 30. FORMULA OF THE TRIBUNATE IN THE PROVINCES. [Sidenote: Tribunatus Provinciarum.] 'It is right that one who has served his time in civil employment should receive his reward, and we therefore appoint as your Tribune the man who has a right to the office by seniority. You are to obey him, since officers of this kind partake of the nature of Judges [governors], as they are called to account for any excesses committed by you.' [Who this Tribune was--since the _Tribunus Voluptatum_ is apparently out of the question--and how his jurisdiction fitted in to that of other officers, Manso (p. 362) deems it impossible to decide, nor can I offer any suggestion.] 31. FORMULA OF THE PRINCEPS OF THE CITY OF ROME. [Sidenote: Formula Principatus Urbis Romae.] 'As there must be the _Officium_, of a Count in Rome, and as we want to have our chief Princeps[487] near us [in Ravenna], we wish you to take his place and wield power as his _Vicarius_ in Rome. [Footnote 487: 'Principem nostrum _cardinalem_' (observe this use of the word).] 'If you think that any of the _Comitiaci_ ought to be sent to attend our Comitatus [at Ravenna], do so at your own discretion, retaining those whom you think proper to retain at Rome. Let there be an alternation, however, that one set of men be not worn out with continuous labour, while the others are rusting in idleness.' 32. FORMULA OF THE MASTER OF THE MINT. [Sidenote: Formula qua Moneta Committitur.] 'Great is the crime of tampering with the coinage; a crime against the many--whose buying and selling is disturbed by it; and a crime and a sacrilege against us, whose image is impressed on the coins. 'Let everything be pure and unalloyed which bears the impress of our Serenity. Let the flame of gold be pale and unmixed, let the colour of silver smile with its gracious whiteness, let the ruddy copper retain its native glow. 'Coins are to keep their full weight. They used to pass current by weight, not by tale, whence the words for profit and expenditure[488]. _Pecunia_ was named from cattle (pecus). You must see that our money does not return to this low condition. King Servius first used stamped money. Take then the care of the mint; hold it for five years, and be very careful how you administer it.' [Footnote 488: 'Compendium et dispendium' (from _pendere_, to weigh).] 33. FORMULA RESPECTING THE AMBASSADORS OF VARIOUS NATIONS. [Sidenote: Formula Legatorum Gentium Diversarum.]