Complex sentence: In particular, he refused to act on reports from James Abbott, the Political Agent in Hazara, who was convinced that Sirdar Chattar Singh Attariwalla, the Sikh Governor of Hazara, was actively plotting a rebellion with other Sirdars.
Split into simpler sentences: In particular, he refused to act on reports from James Abbott, the Political Agent in Hazara. Abbott was convinced that Sirdar Chattar Singh Attariwalla, the Sikh Governor of Hazara, was actively plotting a rebellion with other Sirdars.