Final answer:
The character Torvald, not Mattsson, fell ill from overworking himself in the play 'His Mother's Portrait'. He recovered completely after spending a year in Italy as prescribed by the doctors.
Step-by-step explanation:
In the excerpt from the play "His Mother's Portrait," it appears that the character Mattsson does not fall ill after the wedding; rather, a character named Torvald is the one who falls ill from overworking himself.
The dialogue from the play indicates that Torvald was working hard to earn more money after he left his office, which led to his serious illness. His condition was so dire that doctors recommended a warmer climate for recovery, prompting a trip to Italy.
Nora, another character from the play, reveals that after spending a year in Italy, Torvald returned completely healed and remains healthy since then. Clearly, the recuperation was a success, and the warmer climate alongside a break from his strenuous occupational duties greatly contributed to his recovery.
Furthermore, the children and Nora are also healthy, signifying that the illness has not had a long-term impact on the family's well-being.