(British) Army List - for 1840
Page 251 notes Geo. Marmaduke REEVES as a Captain currently serving in the 99th (or Lanarkshire) Regiment of Foot.
He has 14 year service on Full Pay and an additional 2 years and 3 months on Half Pay.
He was promoted Ensign on 1 July 1824, purchased his commission as Lieutenant on 8 April 1826, and purchased his current commission as Captain on 27 April 1827.
He is the second most senior Captain in his regiment.
The regiment returned from Mauritius on 5 October 1837.