Exploration of copper mines on Lake Superior Type Letterbook Title Exploration of copper mines on Lake Superior Description This letter directs the Commanding Officer to assist Mr. Cooper's exploration of the copper mines on Lake Superior. Cooper is introduced as the son of a Congressman from New York. year created 1800 month created 11 day created 24 author Samuel Dexter sent from location War Department recipient Mr. Cooper in collection Letters Sent by the Secretary of War Relating to Military Affairs (Military Books), Nov 12, 1800-Dec 31, 1889. (RG107) (M6) in image ZZW04 note Addressed to Commanding Officer at Detroit or Michilimackinac author note Samuel Dexter notable person/group Samuel Dexter congress notable location War Department Detroit Michilimackinac Michigan Lake Superior notable item/thing copper document number 1800112400755 page start 7 Layout Sort Position Last edited Last completed Last approved Ascending Descending Sort Filter No filter Is edited Is not edited Is completed Is not completed Is approved Is not approved Filter Show original titles of 1 1–1 of 1 Page Last transcribed Status #1 1letterbook/ZZW04_7.jpg Transcribe September 27, 2020 at 12:04:04 AM Approved #1 1letterbook/ZZW04_7.jpg Transcribe Last transcribed September 27, 2020 at 12:04:04 AM Status Approved