Final answer:
The circumstances of Dr. Roylott's return to India are not detailed in the information provided, but could relate to the educational or social reforms, nationalist movements, and governance changes of the time in India.
Step-by-step explanation:
Dr. Roylott returned to India under circumstances that were not clearly described in the provided information. However, in the context of Indian history during Dr. Roylott's era, the return to India could have been influenced by multiple factors, such as the educational and social reforms taking place, the rising nationalist movement led by figures like Mahatma Gandhi, or the significant changes in India's governance following the Sepoy Rebellion.
Notably, British policies like the doctrine of lapse, the introduction of Western education by Indian reformers such as Ram Mohun Roy, and Gandhi's nonviolent resistance could have contributed to an environment that warranted Roylott's return for reasons possibly related to these reforms and political changes.