While two of the children he had rescued from the salting-tub were causing him so much pain, St. Nicolas was obtaining some consolation from the third. Robin showed himself neither violent in his actions nor arrogant in his thoughts. He had not the sturdy, ruddy appearance of Maxime; nor the grave, audacious manner of Sulpice. Small, thin, yellow, lined, and shrunken, of humble, obsequious and reverential bearing, he devoted himself to assisting the Bishop and clergy, helping the clerks to keep the accounts of the episcopal revenues, and making complicated calculations with the assistance of balls threaded on rods; he even multiplied and divided numbers in his head, without the use of slate or pencil, with a rapidity and accuracy that would have been admired even in a past master of money and finance. For him it was a pleasure to keep the books of the Deacon Modernus, who, growing old, used to muddle the figures and fall asleep at his desk. To oblige the Bishop, and obtain money for him, he spared neither trouble nor fatigue. From the Lombards, he learnt how to calculate both the simple and compound interest on a sum of money for a day, week, month, or year; he feared not to visit the filthy Jews in the black lanes of the Ghetto, in order to learn, by mingling with them, the standard of metals, the price of precious stones, and the art of clipping coin. Ultimately, with a little store which he had accumulated by marvellous industry in Vervignole, in Mondousiana, and even in Mambournia, he attended the fairs, tournaments, pardons, and jubilees, to which people of all conditions flocked from all parts of Christendom: peasants, burghers, clerics, and _seigneurs_; there he changed their money, and every time he returned a little richer than he had departed. Robin did not spend the money he had made, but brought it to the Bishop. St. Nicolas was extremely hospitable, and very liberal in almsgiving. He spent all his property and that of the Church in making gifts to pilgrims and assisting the unfortunate. Thus he continually found himself short of money; and he was much obliged to Robin for the skill and energy with which the young treasurer obtained the sums which he required. The condition of penury in which the holy Bishop had placed himself owing to his magnificence and liberality was greatly aggravated by the condition of the times. The war which was ravaging Vervignole also ruined the Church in Trinqueballe. The soldiery who were fighting in the country-side about the town pillaged the farms, levied contributions on the peasantry, drove out the religious orders, and burned the castles and abbeys.