The growth of any of our Far Western towns presents a curious study. In these latter days it frequently requires but a few months, or even weeks, to give some new one a fair start upon its prosperous way. Sometimes a mineral vein, sometimes the temporary "end of the track" of a lengthening railway, forms the nucleus, and around it are first seen the tents of the advance-guard. Before many weeks have elapsed some enterprising individual has succeeded, in the face of infinite toil and expense, in bringing a sawmill into camp. Soon it is buzzing away on the neighboring hillside, and the rough pine boards and slabs are growing into houses of all curious sizes and shapes, irregularly lining the main street. Delightfully free from conventionality are matters in these new towns. Former notions of things go for naught. Values are in a highly-disturbed state, and you will probably be charged more for the privilege of sleeping somewhere on the floor than for all the refined elegancies of the Fifth Avenue. The board-walks along the street, where they exist at all, plainly typify this absence of a well-defined dead level or zero-point in the popular sentiment; for the various sections are built each upon the same eccentric plan that obtains in the corresponding house. The result is an irregular succession of steps equally irregular, with enough literal jumping-off places to relieve any possible monotony attending the promenade. If the growth of the town seems to continue satisfactory, its houses--at least those in or near its central portions--begin gradually to pass through the next stage in their development. During this interesting period, which might be called their chrysalid state, they are twisted and turned, sometimes sawn asunder, parts lopped off here and applied elsewhere, and all those radical changes made which would utterly destroy anything possessed of protean possibilities inferior to those of the common Western frame house. But, as a final result of this treatment and some small additions of new material, at last emerges the shapely and often artistic cottage, resplendent in paint, and bearing small resemblance to the slab-built barn which forms its framework. If the sometime camp becomes a city--if Auraria grows into a Denver and Fontaine develops into Pueblo--the frame houses will sooner or later share a common fate, that of being mounted on wheels or rollers for a journey suburbward, to make room for the substantial blocks of brick or stone. By this curious process of evolution do most of our Western towns rapidly acquire more or less of a metropolitan appearance. [Illustration: MEXICAN INTERIOR.]