care and anxiety for the building, that Ghiberti was united with Filippo in the work.  The bitter vexation of Filippo, the despair into which he fell, when he heard what the wardens had done, may be understood by the fact that he was on the point of flying from Florence; and had it not been that Donato and Luca della Robbia comforted and encouraged him, he would have gone out of his senses.  A truly wicked and cruel rage is that of those men, who, blinded by envy, endanger the honors and noble works of others in the base strife of ambition:  it was not the fault of these men that Filippo did not break in pieces the models, set fire to the designs, and in one half hour destroy all the labors so long endured, and ruin the hopes of so many years.  The wardens excused themselves at first to Filippo, encouraging him to proceed, reminding him that the inventor and author of so noble a fabric was still himself, and no other; but they, nevertheless, gave Lorenzo a stipend equal to that of Filippo.  The work was then continued with but little pleasure on the part of Filippo, who knew that he must endure all the labors connected therewith, and would then have to divide the honor and fame equally with Lorenzo.  Taking courage, nevertheless, from the thought that he should find a method of preventing the latter from remaining very long attached to that undertaking, he continued to proceed after the manner laid down in the writing given to the wardens.  Meanwhile the thought occurred to the mind of Filippo of constructing a complete model, which, as yet, had never been done.  This he commenced forthwith, causing the parts to be made by a certain Bartolomeo, a joiner, who dwelt near his studio.  In this model (the measurements of which were in strict accordance with those of the building itself, the difference being of size only), all the difficult parts of the structure were shown as they were to be when completed; as, for example, staircases lighted and dark, with every other kind of light, with the buttresses and other inventions for giving strength to the building, the doors, and even a portion of the gallery.  Lorenzo, having heard of this model, desired to see it, but Filippo refusing, he became angry, and made preparations for constructing a model of his own, that he might not appear to be receiving his salary for nothing, but that he also might seem to count for something in the matter.  For these models Filippo received fifty lire and fifteen soldi, as we find by an order in the book of Migliore di Tommaso, under date of the 3d October, 1419, while Lorenzo was paid three hundred lire for the labor and cost of his model, a difference occasioned by the partiality and favor shown to him, rather than merited by any utility or benefit secured to the building by the model which he had constructed.