English: From original book: "As we have before remarked, the architect invariably plans his rooms to accommodate a certain number of mats; and since these mats have a definite size, any indication on the plan of the number of mats a room is to contain gives at once its dimensions also. The mats are laid in the following numbers, — two, three, four and one-half, six, eight, ten, twelve, fourteen, sixteen, and so on. In the two-mat room the mats are laid side by side. In the three-mat room the mats may be laid side by side, or two mats in one way and the third mat crosswise at the end. In the four and one-half mat room the mats are laid with the half-mat in one corner. The six and eight mat rooms are the most common-sized rooms: and this gives some indication of the small size of the ordinary Japanese room and house, — the six-mat room being about nine feet by twelve; the eight-mat room being twelve by twelve; and the ten-mat room being twelve by fifteen. The accompanying sketch (fig. 101) shows the usual arrangements for these mats. In adjusting mats to the floor, the corners of four mats are never allowed to come together, but are arranged so that the corners of two mats abut against the side of a third. They are supposed to be arranged in the direction of a closely-wound spiral (see dotted line in fig. 101). The edges of the longer sides of the ordinary mats are bound with a narrow strip of black linen, as before remarked. In the houses of the nobles this border strip has figures worked into it in black and white, as may be seen by reference to Japanese illustrated books showing interiors. These mats fit tightly, and the floor upon which they rest, never being in sight, is generally made of rough boards with open joints. The mat, as you step upon it, yields slightly to the pressure of the foot; and old mats get to be slightly uneven and somewhat hard from continual use. From the nature of this soft-matted floor shoes are never worn upon it, — the Japanese invariably leaving their wooden clogs outside the house, either on the stepping-stones or on the earth-floor at the entrance. The wearing of one's shoes in the house is one of the many coarse and rude ways in which a foreigner is likely to offend these people. The hard heels of a boot or shoe not only leave deep indentations in the upper matting, but oftentimes break through. Happily, however, the act of removing one's shoes on entering the house is one of the very few customs that foreigners recognize, — the necessity of compliance being too obvious to dispute. In spring-time, or during a rain of long duration, the mats become damp and musty; and when a day of sunshine comes they are taken up and stacked, like cards, in front of the house to dry. They are also removed at times and well beaten. Their very nature affords abundant hiding-places for fleas, which are the unmitigated misery of foreigners who travel in Japan; though even this annoyance is generally absent in private houses of the better classes, as is the case with similar pests in our country. "