While the modern artist duly respects the idiom of his new materials, their diversity and refinement, in granting him the utmost freedom, enable him to attain a truth of execution unknown before to-day. For writing on papyrus a brush had to be used; on vellum or paper, a pen or pencil may also be employed, tracing lines no wider than a hair. Our grandmothers were fond of sewing on a perforated card a motto or a flower in silk thread; such a sampler always had an unpleasant straightness in its outlines. When in weaving silk or linen there may be two hundred threads to the running inch instead of ten, the designer can introduce curves almost as flowing as if he were a painter. So too in architecture: the log hut was perforce straight in its every line; stone and brick made possible the arch; iron and steel are bringing in a free choice of the best lines, whether straight or curved, all with a new sprightliness, as witness the best of our office-buildings in New York, such as the Whitehall, Trinity, and Empire Buildings. [Illustration: Sampler on cardboard, executed in silk thread.] [Illustration: Bark vessel, and derived form in clay. “Form and Ornament in Ceramic Art.” W. H. Holmes.] Old Forms Repeated in New Materials. Art in its early stages seldom displays any outright invention; with all the force of habit the savage artist clings to old familiar shapes, and it is interesting to remark how dealing with a new material may lead or even oblige him to modify a traditional form. The Algonquins inhabit a country in which the birch is common. They cut and fold its bark into vessels which, when imitated in pottery, have an unusual rectangularity. In many Indian tribes it was customary to use as a water-holder the paunch of a deer or a buffalo; many ancient urns of Central America have an aperture at an upper extremity, copied from the paunch, in every case with a simplification of outline. Winged troughs of wood were undoubtedly in the mind of the man who made the earthen vessel illustrated on the next page, found in an ancient grave in Arkansas. As usual the borrower put something of himself into his work, reminding us that the law of evolution is descent with modification. An earthen vessel, illustrated on the next page, was plainly copied from a shell vessel such as the specimen found not far off, in Indiana. When the Clallam Indians, of the State of Washington, began to weave baskets, they imitated the forms of their rude wicker fish-traps. The like persistence was shown by the Haida squaws when taught by the missionaries to make mats from rags; they repeated their ancient twined model, long employed for mats and hats of vegetable fibres. As in America, so also in Europe; when the makers of celts passed from stone to copper or bronze, they reproduced the old forms, and only gradually learned to economize metal, so much stronger than stone, and so much harder to get, by narrowing and flattening their new weapons and tools.