Just prior to the opening of the Exhibition on the 1st May, parties of the corps placed barriers across the various entrances into the building and also at some of the naves leading into the transept. At each outer barrier a small section of men was posted to prevent its removal, or the ingress of persons not authorized to view or take part in the state ceremonial. Within the area of the transept a strong detachment was stationed near Her Majesty, to attend to any orders which Prince Albert or the Royal Commissioners might see necessary to enforce. As the crowd kept flowing in, the “temporary barriers to protect the space round the throne were in part swept away” by the excusable impetuosity of the throng, “and the entire space of the nave seemed to be permanently in possession of the spectators. In this emergency Colonel Reid called out a party of sappers who soon restored order, and thus,” wrote ‘The Times,’ to whose columns these pages are indebted for the above description—“added one additional service to the many others which they had contributed for months within the walls of the Exhibition.” With temper and management the confusion soon subsided, and by ten o’clock order was established, “and reasonable facility afforded for the royal progress round the nave of the building.”[65] Immediately the Queen proclaimed the Exhibition opened, the sappers removed the barriers, and the avenues of the building were at once rendered free for the unrestrained passage of the people. For the temperate, quiet, and efficient conduct of the sappers on the occasion, they received the thanks of Colonel Reid, Sir George Grey, the Home Secretary, and Sir Richard Mayne, the Chief Commissioner of Police.[69] The subjoined table shows the strength of the corps at the Exhibition at the beginning of each month from October, 1850, to December, 1851, and also illustrates the divisions of labour in which the several parties were occupied.[70]