(British) Army List - 1 April 1865
Page 392 notes that Henry Nicholas REEVES is a member of the Bengal Staff Corps with the Army Rank of Lieutenant, currently serving as Assistant Political Agent in Mahee Kanta having been appointed on 28 January 1863.
He last served with the 6th (Bengal) Native Infantry and has 8 years service.
He was appointed 2nd Lieutenant, Cornet or Ensign on 4 January 857 and Lieutenant on 24 May 1859.