Complex sentence: Wellesley employed a number of Nair "advisers" to find out weak spots of Pazhassi military force and Eman was one of them-for his "services" to East India Company, he got 200 rupees per year as allowance.
Split into simpler sentences: Wellesley employed a number of Nair "advisers" to find out weak spots of Pazhassi military force and Eman was one of them. For his "services" to the East India Company, Eman received 200 rupees per year as allowance.