‘The operations of 1878-9 throughout South Africa should be regarded as a whole, and Sir Michael Hicks-Beach trusts that officers of the Regular Army who have organised and led to victory the Colonial Levies in separate commands may be thought not less deserving of the usual military rewards than officers who have served under the immediate direction of the General Commanding-in-Chief in leading her Majesty’s Regular Troops; indeed, those of the former class have some special claims to consideration on account of the difficulties which they had to overcome; and in organising not only a combatant force, but also the Transport, Commissariat, Pay and Hospital Departments of that force, Lieut.-Colonel Warren displayed a general knowledge of his profession which marks him as an especially intelligent and valuable servant of the Queen.’ CHATHAM, 1880 TO 1882 The voyage home from South Africa was very beneficial to Warren’s health, and early in 1880 he was able to take up the duties of the post of Instructor of Surveying at the School of Military Engineering at Chatham, to which he had been appointed. It would be too little to say he entered with his usual zest into his new duties, because he delighted in surveying, and nothing pleased him better than to have a number of young officers to train in all its branches, and to instruct in practical astronomy after Mess in the R.E. Observatory, to say nothing of the large classes of officers of the Line which passed through his hands and the training of the Sappers of his own Corps. In 1881 Warren contributed to the Professional Papers of the Royal Engineers a paper on the Boundary Line between the Orange Free State and Griqualand West. EGYPT AND ARABIA PETRÆA, 1882 TO 1883