This officer entered the army as ensign in the twenty-ninth regiment on the 23d of November 1794, and was promoted lieutenant in the fortieth regiment on the 1st of May 1796. He was advanced to the rank of captain in the eighth West India regiment on the 25th of June 1798, and on the 26th of May 1803 was appointed captain in the royal staff corps, and on the 7th of April 1808 was promoted major in the fifth West India regiment, in which year he joined the staff of the army in the Peninsula, first as assistant adjutant-general, and afterwards as assistant quartermaster-general. Major Arbuthnot was present at the battles of Roleia, Vimiera, and Corunna. On the 24th of May 1810, he received the rank of lieutenant-colonel in the army, and was appointed deputy quartermaster-general at the Cape of Good Hope, where he arrived on the 25th March 1811. Lieut.-Colonel Arbuthnot was appointed aide-de-camp to His Royal Highness the Prince Regent on the 7th of February 1812, and in May 1813 proceeded from the Cape to the Peninsula, and was present at the battles of the Pyrenees, Nivelle, and Orthes. For these services in the Peninsula and south of France he was decorated with a cross and one clasp. On the 24th of March 1814, Brevet Lieut.-Colonel Arbuthnot was appointed lieutenant-colonel of the fifty-seventh regiment, and on the 4th of June following received the brevet rank of colonel in the army. In January 1815 he was nominated a Knight Commander of the Bath, and on the 12th of August 1819 was appointed lieutenant-colonel of the SEVENTY-FIRST regiment. On the 27th of May 1825 he attained the rank of major-general, and on the 15th of August 1836 was appointed colonel of the ninety-ninth regiment. Sir Thomas Arbuthnot was advanced to the rank of lieutenant-general on the 28th of June 1838, and was removed to the fifty-second regiment on the 23d of December 1839. In August 1842 he was appointed to the command of the northern and midland districts of Great Britain, which he retained until his decease. On the 7th of December 1844 Lieut.-General Sir Thomas Arbuthnot was removed from the fifty-second to the ninth foot, and on the 18th of February 1848 was appointed colonel of the SEVENTY-FIRST regiment. Lieut.-General Sir Thomas Arbuthnot, K.C.B., died at Salford, near Manchester, on the 26th of January 1849. SIR JAMES MACDONELL, K.C.B. and K.C.H. _Appointed from the seventy-ninth regiment on the 8th February 1849._ APPENDIX. _Memoir of Captain_ PHILIP MELVILL _of the_ SEVENTY-FIRST _Regiment_.