for the siege of Lucknow by the commander-in-chief in general orders of 16 April 1858, and was repeatedly mentioned in despatches during the several campaigns (London Gazette, 5, 16, and 29 Jan., 25 May, and 17 and 28 July 1858). He was rewarded with a brevet majority and a brevet lieutenant-colonelcy, and received the Indian mutiny medal with two clasps.
Lennox left India in March 1859, and on his arrival home was appointed to the Brighton subdivision of the south-eastern military district. From 14 June 1862 until 31 Oct. 1865 he was deputy-assistant quartermaster-general at Aldershot. On 30 March 1867 he was made a companion of the Bath, military division, for his war services. From November 1866 he held for five years the post of instructor in field fortification at the school of military engineering at Chatham, where his energy and experience were of great value. He originated a series of confidential professional papers to keep his brother officers au courant with matters which could not be published, and also a series of translations of important foreign works on military engineering subjects. He also started the Royal Engineers' Charitable Fund, which has been of much benefit to the widows and children of soldiers of his corps. In 1868 he visited Coblenz and reported on the experimental siege operations carried on there. In the following year he was on a committee on spade-drill for infantry, and accompanied Lieutenant-general Sir William Coddrington to the Prussian army manoeuvres. In the summer of 1870 he visited Belgium to study the fortifications of Antwerp.
From November 1870 to March 1871 he was attached officially to the German armies in France during the Franco-German war ; was present at the siege of Paris under the crown prince of Prussia from 11 to 15 Dec. 1870 ; at the siege of Mézières from 24 Dec. 1870 to its surrender on 2 Jan. 1871 ; at the siege of Paris under the German emperor from 10 Jan. to 4 Feb. ; and at the siege of Belfort from 7 Feb. to the entry of the German troops under von Treskow on 18 Feb.
On 13 Nov. 1871 Lennox was appointed assistant superintendent of military discipline at Chatham, and was on a committee on pontoon drill in December. In 1872 he again attended the military manoeuvres in Prussia. In December 1873 he went to Portsmouth as second in command of the royal engineers, and remained there until his appointment on 24 Oct. 1876 as military attache at Constantinople. He visited Montenegro in connection with the armistice on the frontier, and arrived in Constantinople in December.
In April 1877 he joined the Turkish armies in Bulgaria during the Russo-Turkish war, and was present during the bombardment of Nikopolis in June, at Sistova when the Russians crossed the Danube on 27 June, at the bombardment of Ruschuk, at the battles of Karahassankeui on 30 Aug., Katzelevo on 5 Sept., Bejin Verboka on 21 Sept., and Pyrgos Metha on 12 Dec. 1877. On 18 Dec. he accompanied Suleiman Pasha's force from Varna to Constantinople. He received the Turkish war medal.
On his return home in March 1878 he went to the Curragh in Ireland as commanding royal engineer until his promotion to major-general in August 1881. From 2 Aug. 1884 he commanded the garrison of Alexandria, and during the Nile campaign of 1884-5 organised the landing and despatch to the front of the troops, the Nile boats, and all the military and other stores of the expedition. From Egypt he was transferred on 1 April 1887 to the command of the troops in Ceylon, but his promotion to lieutenant-general vacated the appointment in the following year, and he returned home via Australia and America. He was promoted to be K.C.B. on 30 May 1891. He was director-general of military education at the war office from 22 Jan. 1893 until his retirement from the active list on 8 May 1895. Great energy, unbending resolution, and masterful decision fitted him for high command, while his kindness of heart and Christian character endeared him to many. He was engaged in writing a memoir of Sir Henry Harness's Indian career when he died in London on 7 Feb. 1897, and was buried in the family vault at Brighton cemetery on 15 Feb.
Lennox married, first, at Denbigh, on 16 July 1861, Mary Harriett (d. 22 July 1863), daughter of Robert Harrison of Plas Clough, Denbighshire, by whom he left a son, Gerald Wilbraham Stuart, formerly a lieutenant in the Black Watch. He married secondly, in London, on 12 June 1867, Susan Hay, who survived him, youngest daughter of Admiral Sir John Gordon Sinclair, eighth baronet of Stevenson, by whom he had three sons.
He contributed to the 'Professional Papers of the Royal Engineers' papers on the 'Demolition of the Fort of Tutteah,' 'The Engineering Operations at the Siege of Lucknow, 1858,' 'Description of the Passage of the Wet Ditch at the Siege of Strasburg, 1870,' and others. He compiled 'The Engi-
