Early in 1321 commenced a memorable Iter at the Tower which lasted twenty-four weeks and three days. No such Iter had been held before, although the last Iter held in 1275 had been a remarkable one for the courageous conduct of Gregory de Rokesle, the mayor. This was to surpass every other session of Pleas of the Crown in its powers of inquisition, and was destined to draw off many a would-be loyal citizen from the king’s side. Its professed object was to examine into unlawful "colligations, confederations, and conventions by oaths," which were known (or supposed) to have been formed in the city.(374) The following particulars of its proceedings are gathered from an account preserved in the city’s records and supervised, if not compiled, by Andrew Horn, the city’s Chamberlain, an able lawyer who was employed as Counsel for the city during at least a portion of the Iter.(375) The annoyance caused by this Iter, the general stoppage of trade and commerce, the hindrance of municipal business, is realised when we consider that for six months not only the mayor, sheriffs and aldermen for the time being, but everyone who had filled any office in the city since the holding of the last Iter—a period of nearly half a century—as well as twelve representatives from each ward, were called upon to be in constant attendance. All charters were to be produced, and persons who had grievances of any kind were invited to appear. Great commotion prevailed among the citizens upon receiving the king’s writ, and they at once addressed themselves to examining the procedure followed at former Iters. It is probable, as Mr. Riley suggests, that for this purpose they had resort to the "Ordinances of the Iter" already mentioned as set out in the city’s Liber Albus.(376) When the dreaded day arrived and the justiciars had taken their seat at the Tower, the mayor and aldermen, who, according to custom, as already seen in Rokesley’s day, were assembled at the church of All Hallows Barking, sent a deputation to welcome them, and to make a formal request for a safe conduct to the citizens on entering the Tower. This favour being granted, the king’s commission was read. (M227) The opening of the Iter did not augur well for the city. Fault was found, at the outset, by Geoffrey le Scrop, the king’s sergeant-pleader, because the sheriffs had not attended so promptly as they should have done. The excuse that they had only acted according to custom in waiting for the grant of a safe conduct was held unsatisfactory, and nothing would please him but that the city should be at once taken into the king’s hand.(377) (M228) Again, when the citizens claimed to record their liberties and customs by word of mouth without being compelled to reduce them into writing, as the justices had ordered, the only reply they got was that they did so at their own peril.(378) Three days were consumed in preliminary discussion of points of etiquette and questions of minor importance. (M229)