The Revolt of 1857 concluded in 1858. Let's look at the dates of the given incidents: A) W.C. Rand (Chairman of the Special Plague Committee in Pune) and Lt. Ayerst were assassinated by Damodar Hari Chapekar and Balkrishna Hari Chapekar on 22 June 1897. B) John Saunders was assassinated by Bhagat Singh, Rajguru, and Sukhdev in Lahore on 17 December 1928. C) William Hutt Curzon Wyllie (political aide-de-camp to the Secretary of State for India) was assassinated by Madan Lal Dhingra in London on 1 July 1909. D) A.M.T. Jackson (District Magistrate of Nashik) was assassinated by Anant Laxman Kanhere on 21 December 1909. Comparing the dates after 1857, the assassination of W.C. Rand in 1897 is the earliest incident listed.