=Peculiarities in Marking.=--For the first time in any treatment of the subject, the potters and modellers' marks are given in a table appended to this chapter, which the writer hopes will be found useful in identifying early examples. These hieroglyphics, usually accompanied by the factory mark of the three blue lines, are painters' marks, and in the case of incised marks are representative of the modellers or turners. It may be possible, upon further research being given to the subject, to identify the individual marks of each painter or modeller, and thus arrive at some more definite conclusion in regard to the date at which these early blue-and-white pieces were made. But until the exact list of painters at the factory, together with the dates at which they were employed, is subjected to exhaustive research, it is obviously impossible to establish more than the present series of marks, with limited conclusions in regard to chronological order. The marks now given have been specially drawn from old examples of undoubted authenticity. There is one peculiarity in connection with the marks found on this early blue-and-white porcelain. The bases are frequently ground, and the factory mark of the three blue lines, with an accompanying painter's mark, are on the base, with little spots of glaze put over them no bigger than a threepenny-piece. Another idiosyncrasy of Copenhagen marks, not confined to the blue-and-white, is the almost hidden position in which some of the marks are found. In overglaze painted figures the three blue lines will peep from beneath the hem of some garment. In the blue-and-white examples the mark is sometimes found on the inside of the handle of a teapot or on a lid. In some of the earlier pieces the blue mark has turned to black under the action of the oven. Similarly, in the early days of experiments in connection with the perfecting of the blue, a series of plates will be found of exactly the same decoration and bearing the same painter's signature; but the caprice of the fire, or the inexact knowledge of the craftsman, has converted the blue of some of them into a very deep blue, approaching black in tone.