remembering Mangal Pandey ~ who was the GG during 1857 ??

It is the story of a hero that the Nation must be reading in School books etched in its History – the sad tale of an execution scheduled for April 18 but was carried out ten days before on April 8, 162 years ago. "...  if you read History well, do you remember or know, who was the  Governor General  of British East India Co at the time of the First war of Indian Independence in 1857 ?