But Robert Peel’s attention was principally directed to the _printing_ of calico—then a comparatively unknown art—and for some time he carried on a series of experiments with the object of printing by machinery. The experiments were secretly conducted in his own house, the cloth being ironed for the purpose by one of the women of the family. It was then customary, in such houses as the Peels, to use pewter plates at dinner. Having sketched a figure or pattern on one of the plates, the thought struck him that an impression might be got from it in reverse, and printed on calico with colour. In a cottage at the end of the farm-house lived a woman who kept a calendering machine, and going into her cottage, he put the plate with colour rubbed into the figured part and some calico over it, through the machine, when it was found to leave a satisfactory impression. Such is said to have been the origin of roller printing on calico. Robert Peel shortly perfected his process, and the first pattern he brought out was a parsley leaf; hence he is spoken of in the neighbourhood of Blackburn to this day as “Parsley Peel.” The process of calico printing by what is called the mule machine—that is, by means of a wooden cylinder in relief, with an engraved copper cylinder—was afterwards brought to perfection by one of his sons, the head of the firm of Messrs. Peel and Co., of Church. Stimulated by his success, Robert Peel shortly gave up farming, and removing to Brookside, a village about two miles from Blackburn, he devoted himself exclusively to the printing business. There, with the aid of his sons, who were as energetic as himself, he successfully carried on the trade for several years; and as the young men grew up towards manhood, the concern branched out into various firms of Peels, each of which became a centre of industrial activity and a source of remunerative employment to large numbers of people. From what can now be learnt of the character of the original and untitled Robert Peel, he must have been a remarkable man—shrewd, sagacious, and far-seeing. But little is known of him excepting from traditions and the sons of those who knew him are fast passing away. His son, Sir Robert, thus modestly spoke of him:—“My father may be truly said to have been the founder of our family; and he so accurately appreciated the importance of commercial wealth in a national point of view, that he was often heard to say that the gains to individuals were small compared with the national gains arising from trade.”