This was not the case with Mr. Barry. It has been already said, that the most serious difficulties, which he had to encounter, arose from the appointment of various authorities to superintend certain portions of the work, without any dependence on the architect, and without the provision of any tribunal, to which differences between them and him could be referred for final decision. In the case of the New Palace of Westminster, as of other important buildings, experience has tended to show the difficulty (almost amounting to impossibility) of such a division of power and responsibility in the execution of any great public work. This division is likely to suggest itself to official boards or functionaries, anxious to unite all available talent and knowledge in the service of the public. Moreover, what is true in all classes of work is especially true in relation to architecture, many-sided as it is, touching on one side the domain of science, and on the other the domain of art. No architect in his senses is likely to refuse to take advice, in the many and various questions which must meet him in his work, from those who have made such special questions their peculiar study. But to divide power is to paralyse action and destroy responsibility. Even with the most honest intentions, and with the most sincere desire of a good understanding on both sides, differences of opinion must arise between co-ordinate authorities, leading to controversy, which is likely to be obstinate, in proportion to the earnestness and sense of public duty felt by both. Such was certainly Mr. Barry’s experience. The work was so important, that interference on all sides was likely; his own character was certainly one, open enough to suggestions, but ready to resist dictation. The first serious instance of this difficulty showed itself in the long controversy, which arose between him and Dr. D. B. Reid. It will be enough to glance at its leading features, and the principles which it involved. As early as 1839 the attention of the Government and of Parliament was directed to the warming and ventilation of the New Palace generally, and especially of the two Houses themselves. Dr. Reid had for many years devoted much time and study to these subjects, and had attained considerable reputation as an authority upon them. He was accordingly consulted by the Government, and formed a plan, by which all chimneys were to be dispensed with, and all the smoke and vitiated air of every room in the building were to be carried into great shafts, forming towers in external design, in which large furnaces were to create a sufficient upward draught. Similar shafts were to convey cold air for general dispersion, and various mechanical contrivances were to aid the general action of the ventilating system.