That the Navahoes are or were expert engineers, and could construct difficult trails, is evidenced by their trails into Chaca Canyon from the mesa above. Simpson thus describes what he saw in 1849: "A mile further, observing several Navahoes high above us, on the brink of the north wall, shouting and gesticulating as if they were very glad to see us, what was our astonishment when they commenced tripping down the almost sheer wall before them, as nimbly and dexterously as minuet dancers! Indeed, the force of gravity, and their descent upon a steep inclined plane, made such a kind of performance absolutely necessary to insure their equilibrium." They are a remarkably intelligent people, and their faces are, as a rule, pliant and expressive. There is none of the proverbial stolidness to be found among any except very few of the older men of the Navahoes. If you are unwelcome you will know it,--surly looks and words will ask your mission and bid you begone. On the other hand, if you are welcome, glad smiles will light up the faces of your friends, and you will hear sweet words uttered by melodious and tuneful voices. It is seldom that your courteous advances will be repelled, though they are very ready to resent unwelcome intrusions. I have often sat for hours in the hogans of entire strangers, and the conversation of men and women was general and punctuated with laughter and smiles, showing that they know how to make and appreciate jokes. The Navahoes play a game common in the Southwest, which they call nanzosh. It is a simple game, yet they seem to get endless fun and amusement from it, often gambling large sums upon their favorite players, for, while it looks and is simple, it is not easy to play so as to win. It requires great skill and accurate throwing. The implements are two long poles and a small hoop. The poles are generally of alder and in two pieces, a fathom long, and a long, many-tailed string called the turkey-claw is fastened to the end of each. Two players only are needed. One throws the hoop. Both follow, and when they think the hoop is about to fall, they throw their respective poles so that the hoop, in its fall, will rest upon those portions of their poles that give the highest counts. Catlin describes a similar game played by the Mandans, though their pole is a single piece of wood, as is that of the Mohaves and Yumas, both of whom have the same game.