It would appear that the pigments were, formerly as now, ground only in oil: the vernix was added to the colour, by drops, when on the palette; so that, should the new, or recovered old vehicles, if such they be, come into general use, it will not be necessary to discard the supply of oil colours from the shops of our colour-makers. The colours in tubes, which happily have superseded the bladders, will still be in general request. Northcote thought it a great advantage to the old Italian masters that they were under the necessity of making most of their colours themselves. This, certainly, was not the case in the earlier times; for the monks, who were every thing--physicians, painters, chemists, &c.--were not only the patrons and dealers, but were makers of the colours also. We cannot quite agree with Northcote. The only objection we have to offer to the present system of tube colours is as regards their cost; for, considering the value of the materials, the cost of putting them up seems very exorbitant. This is of little consequence, indeed, in painting easel pictures of no great size; but if we are to proceed on the large scale, which the Commission for the Fine Arts encourages, it would become a matter of some consideration. It has been supposed that the first colour-shop in London was set up by a servant of Sir Godfrey Kneller's; but there is reason to believe, from some incidental remarks, that the trade existed in De Mayerne's time. Some painters of great eminence had their favourite colour-makers, employed, probably, by themselves exclusively. In a letter, Titian regrets the death of the man who prepared his white,--and De Mayerne says of Vandyke, "He spoke to me of all exquisite white, compared with which the finest whitelead appears gray, which he says is known to M. Rubens. Also of a man who dissolved amber without carbonising it, so that the solution was pale yellow, transparent." We learn from this that there were then colour-makers and varnish-makers, and also that the brilliant white of Rubens may not always have been whitelead.