Bellarion the Fortunate by Rafael Sabatini

Dissensions at the very outset between Carmagnola and Bellarion protracted by some days the preparations for the departure of the army. This enabled Theodore of Montferrat fully to make his dispositions for resistance, to pack the granaries of Vercelli and otherwise victual it for a siege, and to increase the strong body of troops already under his hand, with which he threw himself into the menaced city. Further, by working furiously during those October days, he was enabled to strengthen his bastions and throw up fresh earthworks, from which to shatter the onslaught when it should come.

Upon these very circumstances of which Bellarion and his captains were duly informed followed fresh dissensions. Carmagnola advocated that operations should be begun by the reduction of Mortara, which was being held for Theodore, and which, if not seized before they marched upon Vercelli, would constitute, he argued, a menace upon their rear. Bellarion's view was that the menace was not sufficiently serious to merit attention; that whilst they were reducing it, Theodore would further be strengthening himself at Vercelli; and that, in short, they should march straight upon Vercelli, depending that, when they forced it to a capitulation, Mortara would thereby be scared into immediate surrender.