In April a party, hutted on the bleak heath of Aldershot, commenced a series of surveys, having reference to the use of the moor as a military camp for periodical evolution and exercise. The detachment mustered at one time as many as twenty-four non-commissioned officers and men, and dwindled down to an initial party of a few choice hands to finish the operation. Captain Cameron, R.E., had the direction of the service; and corporal James Macdonald, now sergeant, a non-commissioned officer of tried ability and indefatigable activity, was its local superintendent. In ten months the detachment, after being instructed by the corporal, completed a survey of a selected district of about 800 acres for the Commander-in-Chief; another of some 1,500 acres for the professional use of Major-General Sir Frederic Smith; and a general one for the Ordnance, including the ground specially surveyed, extending over an area of 13,000 acres. Each survey provided its contours to suit particular requirements; and the whole range of duties for providing data for the plans, usually performed by different parties, with qualifications adapted to each particular service, were wholly carried out by corporal Macdonald[128] and his party. The work has since been engraved on the 6-inch scale. Six rank and file to complete the mint detachment at Sydney, embarked in two parties on the 8th April and 19th June, taking with them the portable houses, shops, machinery, and stores necessary for the formation of the establishment. The men had all been instructed prior to leaving the royal mint in London in the art of coining, and were taught by Messrs. Walker, of Millwall, the method of fitting together the iron roofing, cisterns, girders, &c., to form the mint buildings. One man had also been instructed by Messrs. Whitworth and Co. at Manchester, in the manipulation and action of the several lathes to be used in the coining processes. They respectively reached Sydney on the 10th July and 24th October.