It would be useful to determine more definitely the times of Gattinara's absences from the imperial presence. If one can entertain the assumption that the imperial chancellery pertaining to the empire proper, while outside the confines of the empire, remains with the person of the Grand Chancellor, then by comparing the dates and places of petitions granted by that section of the imperial chancellery receiving petitions, as presented in Die Reichsregisterbücher Kaiser Karls V, ed. Lothar Gross (Vienna, Leipzig, 1913/1930), pp. 1–82, with the movements of Charles and his court, as presented in Collection des Voyages des Souverains des Pays-Bas, II, ‘Itineraire de Charles-Quint’, ed. [L. P.] Gachard (Brussels, 1874), pp. 3–50 (see Vandenesse), based on acts in the Archives du Nord, then one might conceivably be able to plot the times at which Gattinara was absent from the emperor. Unfortunately, however, such an assumption is not always supported by the known facts, although in the majority of instances Gattinara's letters will reveal a date and place that corresponds with the time and location of the imperial chancellery. Beyond the obvious extended absences produced by the Calais negotiations from the end of August to early December 1521 and the Italian trip March to September 1527, there exist some other exceptions. Rather than being with the registers of the imperial chancellery at Pamplona until 27 January 1524 Gattinara accompanies the emperor, for he writes on 20 January to Clement VII from Vittoria (Bornate, ‘Doc.’, p. 437).