(New Brunswick Museum,
Peter Mitchell was a first generation New Brunswicker, born to Scottish parents. He became involved in the shipbuilding business on the Miramichi, and remained an active player in the industry until 1868. Mitchell also studied law, and eventually opened a practice with John Mercer Johnson. He entered the realm of politics and gained the seat for Northumberland in 1857.
Peter Mitchell became the President of the Executive Council in 1861. He was an avid supporter of Confederation, and went to the Quebec as well as London Conferences. He succeeded Samuel Leonard Tilley as leader of the Confederation Party and became Premier of New Brunswick in 1866, leading the province into Confederation.