Sir Samuel Bentham, who then filled the office of Inspector-General of Naval Works, was a highly ingenious person, and had for some years been applying his mind to the invention of improved machinery for working in wood. He had succeeded in introducing into the royal dockyards sawing-machines and planing-machines of a superior kind, as well as block-making machines. Thus the specification of one of his patents, taken out in 1793, clearly describes a machine for shaping the shells of the blocks, in a manner similar to that afterwards specified by Brunel. Bentham had even proceeded with the erection of a building in Portsmouth Dockyard for the manufacture of the blocks after his method, the necessary steam-engine being already provided; but with a singular degree of candour and generosity, on Brunel's method being submitted to him, Sir Samuel at once acknowledged its superiority to his own, and promised to recommend its adoption by the authorities in his department. The circumstance of Mrs. Brunel's brother being Under-Secretary to the Navy Board at the time, probably led Brunel in the first instance to offer his invention to the Admiralty. A great deal, however, remained to be done before he could bring his ideas of the block-machinery into a definite shape; for there is usually a wide interval between the first conception of an intricate machine and its practical realization. Though Brunel had a good knowledge of mechanics, and was able to master the intricacies of any machine, he laboured under the disadvantage of not being a practical mechanic and it is probable that but for the help of someone possessed of this important qualification, his invention, ingenious and important though it was, would have borne no practical fruits. It was at this juncture that he was so fortunate as to be introduced to Henry Maudslay, the inventor of the sliderest.