But an architect’s work is not purely artistic. The construction both of the New Palace itself and of the scaffolding used in its erection, taxed heavily scientific knowledge and ingenuity.[84] In fact, the whole timber or framed scaffolding, with travellers, by which a stone, perhaps elaborately carved, could be raised from the ground, and placed in its proper position, had seldom, if ever, before been employed on so large a scale. The constructional difficulties introduced by the need of preservation of old buildings, and of piecemeal occupation of the new ones, were great. But even greater were those caused by the frequent change and increase of official requirements in the course of the work; and most of all by the appointment of Dr. Reid, and his enormous claims of space for warming and ventilation, never known till the whole arrangement of plan and construction was settled. Into all these difficulties Mr. Barry himself fully entered. He felt a positive pleasure in the expedients by which they were to be met; and in the invention of such expedients he was full of resources, and bold even to the verge of rashness. But his knowledge was more practical than theoretical, and in his work he received the most valuable assistance from the scientific knowledge, ingenuity, and power of contrivance of Mr. Meeson, who was for a long time his chief assistant in this branch of office work. His aid was zealously and unobtrusively given, and heartily appreciated. Working side by side with him, and bringing practical energy, daring, and ingenuity to carry out much difficult and hazardous work, Mr. Quarm did good service to the building, and showed an enthusiastic loyalty and devotion towards his chief. Meanwhile in the office Mr. Barry had associated with himself a series of able and zealous assistants, who were destined hereafter to make themselves a place in the architectural profession. He certainly was able to kindle in them a rare degree of enthusiasm for art, side by side with a strong personal attachment to himself, arising chiefly from sympathy in this enthusiasm. And it can hardly be doubted, that his peculiar refinement of detail and proportion, his careful study of every part of a building, and his resolution to attempt, even in comparatively trifling works, originality and unity of effect, must have left their traces on the designs of those who had been associated with him.