The chart exhibited in the transept on the 6th October, to show by diagrams the fluctuations in the number of visitors to the building, was prepared by corporals Gardner and Mack, under the direction of Captain Owen. ‘The Times,’[73] said it was “a production of great merit and of much public interest, and resembled those scales of mountain elevations which are usually prefixed to atlasses. The shilling days were the Himalayas and Andes of the chart; while the half-crown and five shilling days were represented by heights of much lower altitude.” With the permission of the Executive Committee, these two non-commissioned officers compiled, on the same principle, a similar diagram with more copious general information, for the proprietors of the ‘Weekly Dispatch,’ from which an engraving was made, and copies in immense numbers were thrown off and issued on two stated occasions to the purchasers of that newspaper. Referring to the great chart shown in the Exhibition, the ‘Weekly Dispatch’ thus wrote: “This chart, which is beautifully executed, and is altogether a production of very great merit, reflects the utmost credit upon the authors—corporals Gardner and Mack of the royal sappers and miners, a corps which has rendered most intelligent and valuable service to the Exhibition.”[74] Corporal Baker, under Mr. Henry Cole, had the honour of preparing a coloured plan of the arrangements for Her Majesty, another for Prince Albert, one for the Duchess of Kent, and several for the members of the Royal Commission. He also surveyed the whole of the arrangements on the ground floor. In an instructive article in ‘Chambers’ Journal,’ on the ‘Crystal Palace,’ allusion is popularly made to this portion of the sappers’ duty, and it is justly added, that “the men were found very useful. All our surveying and planning have been done by them.”[75] During the latter months of the Exhibition, corporal Clabby recorded hourly the number of visitors who had entered the building up to the time of making the registry. This he did on a large sheet of paper fixed in the transept, at a sufficient elevation for the public to consult it. The rush at the moment of making the record was always great, and the interest with which the corporal was greeted and questioned by the curious, was accompanied by many honourable indications of kindness and good will.[76] Two men were in permanent charge of the receipt and issue of printed forms, and all articles of stationery to the various officers. Second-corporal John Vercoe was in chief charge. He also assisted as a clerk, and was pay-sergeant for Lieutenant Stopford’s detachment. From the 2nd October, 1850, to 23rd January, 1851, he had the charge of the party then at the Exhibition, and for his courteous deportment and address, was well spoken of by those with whom he was brought in contact.[77]