Giovanni compared it with that of St. John. 'Yes,' he exclaimed awestruck; 'it is he! He of whom it is said, Satan entered into him; who perhaps knew more than any of them, but who would not accept the cry, that 'all may be one!' because he desired to be an one by himself.'

He was interrupted by Cesare da Sesto, who burst into the refectory, followed by a man in the court livery.

'At last! at last!' he cried; 'Master, we have sought you in every place! The duchess requires you—on a grave matter.'

'Your Worship will have the kindness to come with me to the palace,' said the servant.

'What is the cause?'

'A disaster, Messer Leonardo. The water pipes do not work; and this morning when Her Excellence was pleased to get into her bath, and her woman had gone to the adjoining chamber for linen, the tap broke, so that Her Excellence was nearly scalded. She is pleased to be very wroth; and Messer Ambrogio Ferrari, the steward, complains greatly, and saith he hath more than once warned your Worship about these pipes.'

'What puerility is this?' replied Leonardo; 'can you not see I am at work? Go to Zoroastro. In half an hour he will repair everything.'

'Messere, I was told not to return without your Worship.'

Leonardo, however, went back to his picture. But when his eye fell on the blank space destined for the Saviour's head, his brows knit with discouragement, and, realising fresh failure, he descended from the easel.

'Well, we will go. You, Giovanni, come for me to the outer courtyard of the castle, Cesare will show you the way; I will expect you by the Cavallo.'