The most important administrative reform that Indians desired from 1885 to 1905 was the Indianisation of higher grades of administrative services. This refers to the demand for greater representation of Indians in the higher ranks of the colonial administration. This demand was primarily driven by the desire to have more control over the governance of India and to address the grievances of the Indian population.

- Background:
During this period, India was under British colonial rule, and the Indian National Congress (INC) had been formed in 1885 to represent the interests of Indians and seek reforms. The early years of the INC saw the emergence of moderate leaders who advocated for greater representation of Indians in the administration.

- Importance of Indianisation:
1. Representation: The Indianisation of administrative services was seen as a means to ensure that Indian interests and perspectives were adequately represented in the governance of the country. Indians believed that their knowledge of local conditions and their understanding of the needs and aspirations of the people would be better addressed if they held key positions in the administration.

2. Empowerment: The demand for Indianisation was also driven by the desire for greater self-governance and empowerment. Indians wanted to participate in decision-making processes and have a say in policies that directly affected them. They believed that Indian administrators would be more responsive to the needs of the people and would work towards the upliftment of Indian society.

3. Equality: Indianisation was also seen as a way to address the racial discrimination and inequality that existed in the colonial administration. Indians were often excluded from higher positions and were relegated to subordinate roles. The demand for Indianisation aimed to challenge this discriminatory practice and create a more equitable system.

- Impact and Achievements:
The demand for Indianisation had a significant impact on the political landscape of India. It led to the appointment of more Indians in higher administrative positions, although progress was slow and limited. The Indian Civil Service (ICS) examinations were opened to Indians, and some Indian candidates were able to secure high-ranking positions.

The demand for Indianisation also laid the foundation for future administrative reforms and the eventual transfer of power from the British to the Indian leadership. It created a sense of unity and purpose among the Indian population and strengthened the nationalist movement.

In conclusion, the Indianisation of higher grades of administrative services was the most important administrative reform desired by Indians from 1885 to 1905. It represented the aspirations of the Indian population for greater representation, empowerment, and equality in the colonial administration. Despite its limitations, the demand for Indianisation played a crucial role in shaping the course of India's struggle for independence.