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June to Ayamonte, and rode round the sea coast to Corunna, whence, after a short stay in Galicia, he want back to Cadiz by another route.

In March 1812 Landmann sailed for England in company with the Spanish ambassador. His health was now so impaired that he was unable to return to duty until July 1818. when he was sent to Ireland to command the engineers in the Lough Swilly district. He been promoted on 4 June 1813 brevet-major for his services, and became lieutenant-colonel on 16 May 1814. In March 1815 he was appointed commanding engineer of the same district, and in May 1817 was transferred to Hull as commanding royal engineer of the Yorkshire district. He was granted leave of absence in 1819, and appears to have continued on leave until he retired from the corps, by the sale of his commission, on 29 Dec. 1824. He was a member of the Institution of Civil Engineers until 1862. He died at Shacklewell near Hackney, London, on 27 Aug. 1854.

Landmann was author of:

  1. ‘Historical, Military, and Picturesque Observations in Portugal, illustrated numerous coloured Views and authentic Plans of all the Sieges and Battles fought in the Peninsula during the present War,’ 2 vols. 4to, London, 1818.
  2. Adventures end Recollections of Colonel Landmann,’ 2 vols, 8vo, London, 1852.
  3. ‘Recollections of my Military Life,’ 2 vols, 8vo, London, 1854 (cf. Athenæum, 1854. pp. 679-681).

He also revised his father's 'Principles of Fortifications,' 8vo, London, 1881.

[Corps Records; Landmann's Works; Gent. Mag. 1854, pt. i. p. 422; Royal Military Calendar, 1826, vol. v. 3rd ed. p. 26; Pantheon of the Age of Fortifications,' ii. 515.]

R. H. V.

LANDMANN, ISAAC (1741–1829?), professor of artillery and fortification, born in 1741, held for some years an appointment at the Royal Military School in Paris. Although he retired on the reorganisation of the school, he continued to live in Paris, and made an incomeof about 300l. per annum by teaching the our French nobility the art of war. On 25 Nov. 1777 he assumed the appointment of professor of artillery and fortification at the Royal Military Academy at Woolwich at the invitation of George III. A letter from the board of ordnance, dated 25 Nov. 1777, introducing in him to the lieutenant-governor of the Woolwich Academy, described him as a gentleman who ‘has seen a great deal of service and acted as aide-de-camp to Marshal Broglis in the law war.’ His salary was 494l. per annum with a house. On 1 July 1815 he retired, after thirty-eight years' successful service, on a pension of 500l. per annum, granted him 1by the prince regent. He left a son, George Thomas Landmann [q. v.], who was an officer in the royal engineers.

Landmann was author of:

  1. 'Elements of Tactics and Introduction to Military Evolutions for the Infantry, by a celebrated Prussian General [Saltern], translated from the original by I. L.,’ 8vo, London, 1787.
  2. ‘Practical Geometry for the use of the Royal Military Academy at Wolwich,’ 8vo, London, 1798; 2nd ed. 1805.
  3. ‘The Field Engineers Vade Mecum, with Plans,’ 8vo, London, 1802.
  4. ‘The Principles of Fortification reduced into Questions and Answers for the use of the Royal Military Academy at Woolwich,’ 8vo, London, 1806.
  5. ‘The Construction of several Systems of Fortification,' 8vo, London, with plates, vol. 1807.
  6. ‘The Principles of Artillery reduced into Questions an Answers for the use of the Royal Military Academy at Woolwich,' 2nd ed., with considerable additions and improvements, 8vo, London, 1808.
  7. ‘Muller's Attack and Defence of Places' 4th ed. 8vo, London.
  8. ‘A Course of an Five Orders of Architecture,' fol. London.
  9. ‘A Treatise on Mines for the use of the Royal Military Academy, Woolwich,' 8vo, London, 1815.
  10. ‘The Principles of Fortification,' 5th ed. 8vo, London, 1821.

Records of the Royal Military Academy, Woolwich, 4to, 1851.]

R. H. V.

LANDON, LETITIA ELIZABETH, afterwards Mrs. MacLean (1802–1888), poetess, and famous in her day under the initials 'L.E.L.,’ was born in Hans Place, Chelsea, on 14 Aug. 1802. She was descended from a family once posseseed of considerable landed property at Crednall in Herefordshire, which was lost in the South Sea bubble. The descendants took to the church, and Letitia’s great-grandfather is recorded on his monument to have employed his pen ‘to the utter confutation of all dissenters.' Her grandfather was rector of Tedstone Delamere, Herefordshire. Her uncle, Dr. Whittinton Landon, who died on 29 Dec. 1838, held at the time the deanery of Exeter, to which he was a pointed in 1818, and the provostship of Worcester College, Oxford, to which he had been nominated in 1796 (cf. Gent. Mag. 1889, i. 212). Her father, John Landon, who in his youth had voyaged to Africa and Jamaica, was at the time of her birth a partner in Adair's army agency in Pall Mall. Her mother, whose maiden name was Bishop, was of Welsh extraction; her maternal grand-mother, an intimate friend of Mrs. Siddons,