The Professor showed it to him.
"Do you not remember," he said, using the affectionate "thou", "that we brought it with us ?" Benedetto looked at him, pleased at the new word of affection, and stretched out his hand in search of Mayda's; the Professor took it tenderly between his own.
At the same time he felt humiliated by his own forgetfulness.

Was he about to lose his reason?
All the previous day he had thought about the words he should speak to his friends, and to the person who had made her invisible presence so keenly felt.

But if he lost his reason?
The Professor began to saturate him with quinine.

At first Benedetto accepted these painful injections and bitter doses willingly, in his desire to grow a little stronger, and thus to ward off the darkening of his spirit, and also because he wished to suffer.

Oh yes! to suffer, to suffer! During the preceding days he had suffered greatly, not from any local pain, not from any acute pain, but his was an inexpressible suffering, which extended from the roots of his hair to the soles of his feet.